package contest210924;

import java.io.*;
import java.util.*;
import java.util.function.IntUnaryOperator;
import java.util.function.LongUnaryOperator;

public class F3 {
	InputStream is;
	FastWriter out;

	String INPUT = "";

	public static class CombinationParser
	{
		final int mod;
		final int[][] fif;

		public CombinationParser(int mod, int n){
			this.mod = mod;
			this.fif = enumFIF(n, mod);
		}

		char[] s;
		int pos, len;
		Map<String, Long> values;

		public long parsei(String S, Map<String, Integer> values){
			this.values = new HashMap<>();
			for(String key : values.keySet()){
				this.values.put(key, values.get(key).longValue());
			}
			return parse(S, this.values);
		}

		public long parse(String S, Map<String, Long> values){
			s = S.replace(" ", "").toCharArray();
			pos = 0;
			len = s.length;
			this.values = values;
			long res = exprpm();
			if(pos != len)throw new AssertionError("pos != len: " + pos + " " + len);
			return res;
		}

		// +-
		long exprpm()
		{
			long v = exprmd();
			while(pos < len){
				if(s[pos] == '+'){
					pos++;
					v += exprmd();
				}else if(s[pos] == '-'){
					pos++;
					v -= exprmd();
				}else{
					break;
				}
			}
			v %= mod;
			if(v < 0)v += mod;
			return v;
		}

		// */
		long exprmd()
		{
			long v = expre();
			while(pos < len){
				if(s[pos] == '*'){
					if(pos+1 < len && s[pos+1] == '*'){
						break;
					}
					pos++;
					v = v * expre() % mod;
				}else if(s[pos] == '/'){
					pos++;
					long res = expre();
					if(res == 0)throw new AssertionError("divide by zero: " + pos);
					v = v * invl(res, mod) % mod;
				}else if(s[pos] == '+' || s[pos] == '-' || s[pos] == ')' || s[pos] == ',') {
					break;
				}else{
					// 乗算とみなす
					v = v * expre() % mod;
					break;
				}
			}
			v %= mod;
			if(v < 0)v += mod;
			return v;
		}

		long expre()
		{
			long v = expr();
			if(pos >= len)return v;
			if(s[pos] == '*' && pos+1 < len && s[pos+1] == '*'){
				pos+=2;
				v = pow(v, expr(), mod);
			}else if(s[pos] == '^') {
				pos++;
				v = pow(v, expr(), mod);
			}
			return v;
		}

		long expr()
		{
			if(s[pos] == '('){
				pos++;
				long res = exprpm();
				expect(')');
				pos++;
				if(pos < len && s[pos] == '!'){
					res = fif[0][(int)res];
					pos++;
				}
				return res;
			}else if(s[pos] == '-'){
				// 単項minus
				pos++;
				long res = item();
				res = -res;
				if(res < 0)res += mod;
				return res;
			}else{
				return item();
			}
		}

		void expect(char c)
		{
			if(s[pos] != c)throw new AssertionError("expect '" + c + "' @" + pos);
		}

		long item()
		{
			if(s[pos] == 'C' && pos+1 < len && s[pos+1] == '('){
				pos++;
				pos++;
				long n = exprpm(); // FIXME: modではない
				expect(',');
				pos++;
				long r = exprpm();
				expect(')');
				pos++;
				return C((int)n, (int)r, mod, fif);
			}else if('0' <= s[pos] && s[pos] <= '9'){
				// 即値
				long val = 0;
				while(pos < len && '0' <= s[pos] && s[pos] <= '9'){
					val = (val * 10 + s[pos]-'0') % mod;
					pos++;
				}
				long res = val;
				if(pos < len && s[pos] == '!'){
					res = fif[0][(int)res];
					pos++;
				}
				return res;
			}else{
				// 変数
				StringBuilder v = new StringBuilder();
				while(pos < len && (
						'a' <= s[pos] && s[pos] <= 'z' ||
						'A' <= s[pos] && s[pos] <= 'Z' ||
						'0' <= s[pos] && s[pos] <= '9'
						)){
					v.append(s[pos]);
					pos++;
				}
				if (!values.containsKey(v.toString())) {
					throw new AssertionError("undefined variable: " + v + " @" + pos);
				}
				long res = values.get(v.toString());
				if(pos < len && s[pos] == '!'){
					res = fif[0][(int)res];
					pos++;
				}
				return res;
			}
		}

	public static long pow(long a, long n, long mod) {
		//		a %= mod;
		long ret = 1;
		int x = 63 - Long.numberOfLeadingZeros(n);
		for (; x >= 0; x--) {
			ret = ret * ret % mod;
			if (n << 63 - x < 0) ret = ret * a % mod;
		}
		return ret;
	}


	public static long invl(long a, long mod) {
			long b = mod;
			long p = 1, q = 0;
			while (b > 0) {
				long c = a / b;
				long d;
				d = a;
				a = b;
				b = d % b;
				d = p;
				p = q;
				q = d - c * q;
			}
			return p < 0 ? p + mod : p;
		}

		public static long C(int n, int r, int mod, int[][] fif) {
			if (r < 0 || r > n) return 0;
			return (long) fif[0][n] * fif[1][r] % mod * fif[1][n - r] % mod;
		}

		public static int[][] enumFIF(int n, int mod) {
			int[] f = new int[n + 1];
			int[] invf = new int[n + 1];
			f[0] = 1;
			for (int i = 1; i <= n; i++) {
				f[i] = (int) ((long) f[i - 1] * i % mod);
			}
			long a = f[n];
			long b = mod;
			long p = 1, q = 0;
			while (b > 0) {
				long c = a / b;
				long d;
				d = a;
				a = b;
				b = d % b;
				d = p;
				p = q;
				q = d - c * q;
			}
			invf[n] = (int) (p < 0 ? p + mod : p);
			for (int i = n - 1; i >= 0; i--) {
				invf[i] = (int) ((long) invf[i + 1] * (i + 1) % mod);
			}
			return new int[][]{f, invf};
		}
	}



	public static final int mod = 998244353;

	public void solve()
	{
		int n = ni(), m = ni(), K = ni();

		var ps = new CombinationParser(998244353, 1000005);

		var params = Map.of("n", n, "m", m, "k", K);

		long D = ps.parsei("C(n,k-2)*C(m,k-2)*(k-2)!", params);
		long r1 = ps.parsei("C(n,k-1)*C(m,k-1)*(k-4)!*C(k-1,3)**2*9", params);
		long o2n = ps.parsei("C(k-2,2)*C(m-(k-2),2)*2/4 + C(k-2,2)*C(n-(k-2),2)*2/4", params);
		long o2v = ps.parsei("C(k-2,2)*(m-(k-2)) + C(k-2,2)*(n-(k-2))", params);
		long o2h = ps.parsei("(C(n,k-3)*C(m,k-3)*(k-3)!*C(m-(k-3),3)*(n-(k-3)) + C(n,k-3)*C(m,k-3)*(k-3)!*C(n-(k-3),3)*(m-(k-3)))", params);
		long o1n = ps.parsei("(((k-2)**2-(k-2))*(k-2-2)*(m-(k-2)) + ((k-2)**2-(k-2))*(k-2-2)*(n-(k-2)))/2", params);
		long o1h = ps.parsei("(((k-2)**2-(k-2))*(m-(k-2)) + ((k-2)**2-(k-2))*(n-(k-2)))/2", params);
		long o0n = ps.parsei("1/2*C(k-2,2)", params);
		long o0h = ps.parsei("2*(k-2)*C(k-3,2)", params);
		long o0l = ps.parsei("C(k-2,3)*3*2", params);
		long o0i = ps.parsei("C(k-2,2)*C(k-4,2)/2*4", params);

		long ans = r1 + o2n * D + o2v * D + o2h + o1n * D + o1h * D + o0n * D + o0h * D + o0l * D + o0i * D;
		out.println(ans%mod);
	}

	public static void main(String[] args) {
		new F3().run();
	}

	public void run()
	{
		long S = System.currentTimeMillis();
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new FastWriter(System.out);

		solve();
		out.flush();
		long G = System.currentTimeMillis();
		tr(G-S+"ms");
		//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
		//			@Override
		//			public void run() {
		//				long s = System.currentTimeMillis();
		//				solve();
		//				out.flush();
		//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
		//			}
		//		};
		//		t.start();
		//		t.join();
	}

	private boolean eof()
	{
		if(lenbuf == -1)return true;
		int lptr = ptrbuf;
		while(lptr < lenbuf)if(!isSpaceChar(inbuf[lptr++]))return false;

		try {
			is.mark(1000);
			while(true){
				int b = is.read();
				if(b == -1){
					is.reset();
					return true;
				}else if(!isSpaceChar(b)){
					is.reset();
					return false;
				}
			}
		} catch (IOException e) {
			return true;
		}
	}

	private final byte[] inbuf = new byte[1024];
	public int lenbuf = 0, ptrbuf = 0;

	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}

	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	//	private boolean isSpaceChar(int c) { return !(c >= 32 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }

	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }

	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}

	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}

	private char[][] nm(int n, int m)
	{
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}

	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}

	private long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		return a;
	}

	private int ni()
	{
		int num = 0, b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}

		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}

	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}

		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}

	public static class FastWriter
	{
		private static final int BUF_SIZE = 1<<13;
		private final byte[] buf = new byte[BUF_SIZE];
		private final OutputStream out;
		private int ptr = 0;

		private FastWriter(){out = null;}

		public FastWriter(OutputStream os)
		{
			this.out = os;
		}

		public FastWriter(String path)
		{
			try {
				this.out = new FileOutputStream(path);
			} catch (FileNotFoundException e) {
				throw new RuntimeException("FastWriter");
			}
		}

		public FastWriter write(byte b)
		{
			buf[ptr++] = b;
			if(ptr == BUF_SIZE)innerflush();
			return this;
		}

		public FastWriter write(char c)
		{
			return write((byte)c);
		}

		public FastWriter write(char[] s)
		{
			for(char c : s){
				buf[ptr++] = (byte)c;
				if(ptr == BUF_SIZE)innerflush();
			}
			return this;
		}

		public FastWriter write(String s)
		{
			s.chars().forEach(c -> {
				buf[ptr++] = (byte)c;
				if(ptr == BUF_SIZE)innerflush();
			});
			return this;
		}

		private static int countDigits(int l) {
			if (l >= 1000000000) return 10;
			if (l >= 100000000) return 9;
			if (l >= 10000000) return 8;
			if (l >= 1000000) return 7;
			if (l >= 100000) return 6;
			if (l >= 10000) return 5;
			if (l >= 1000) return 4;
			if (l >= 100) return 3;
			if (l >= 10) return 2;
			return 1;
		}

		public FastWriter write(int x)
		{
			if(x == Integer.MIN_VALUE){
				return write((long)x);
			}
			if(ptr + 12 >= BUF_SIZE)innerflush();
			if(x < 0){
				write((byte)'-');
				x = -x;
			}
			int d = countDigits(x);
			for(int i = ptr + d - 1;i >= ptr;i--){
				buf[i] = (byte)('0'+x%10);
				x /= 10;
			}
			ptr += d;
			return this;
		}

		private static int countDigits(long l) {
			if (l >= 1000000000000000000L) return 19;
			if (l >= 100000000000000000L) return 18;
			if (l >= 10000000000000000L) return 17;
			if (l >= 1000000000000000L) return 16;
			if (l >= 100000000000000L) return 15;
			if (l >= 10000000000000L) return 14;
			if (l >= 1000000000000L) return 13;
			if (l >= 100000000000L) return 12;
			if (l >= 10000000000L) return 11;
			if (l >= 1000000000L) return 10;
			if (l >= 100000000L) return 9;
			if (l >= 10000000L) return 8;
			if (l >= 1000000L) return 7;
			if (l >= 100000L) return 6;
			if (l >= 10000L) return 5;
			if (l >= 1000L) return 4;
			if (l >= 100L) return 3;
			if (l >= 10L) return 2;
			return 1;
		}

		public FastWriter write(long x)
		{
			if(x == Long.MIN_VALUE){
				return write("" + x);
			}
			if(ptr + 21 >= BUF_SIZE)innerflush();
			if(x < 0){
				write((byte)'-');
				x = -x;
			}
			int d = countDigits(x);
			for(int i = ptr + d - 1;i >= ptr;i--){
				buf[i] = (byte)('0'+x%10);
				x /= 10;
			}
			ptr += d;
			return this;
		}

		public FastWriter write(double x, int precision)
		{
			if(x < 0){
				write('-');
				x = -x;
			}
			x += Math.pow(10, -precision)/2;
			//		if(x < 0){ x = 0; }
			write((long)x).write(".");
			x -= (long)x;
			for(int i = 0;i < precision;i++){
				x *= 10;
				write((char)('0'+(int)x));
				x -= (int)x;
			}
			return this;
		}

		public FastWriter writeln(char c){ return write(c).writeln(); }
		public FastWriter writeln(int x){ return write(x).writeln(); }
		public FastWriter writeln(long x){ return write(x).writeln(); }
		public FastWriter writeln(double x, int precision){ return write(x, precision).writeln(); }

		public FastWriter write(int... xs)
		{
			boolean first = true;
			for(int x : xs) {
				if (!first) write(' ');
				first = false;
				write(x);
			}
			return this;
		}

		public FastWriter write(long... xs)
		{
			boolean first = true;
			for(long x : xs) {
				if (!first) write(' ');
				first = false;
				write(x);
			}
			return this;
		}

		public FastWriter write(IntUnaryOperator f, int... xs)
		{
			boolean first = true;
			for(int x : xs) {
				if (!first) write(' ');
				first = false;
				write(f.applyAsInt(x));
			}
			return this;
		}

		public FastWriter write(LongUnaryOperator f, long... xs)
		{
			boolean first = true;
			for(long x : xs) {
				if (!first) write(' ');
				first = false;
				write(f.applyAsLong(x));
			}
			return this;
		}

		public FastWriter writeln()
		{
			return write((byte)'\n');
		}

		public FastWriter writeln(int... xs) { return write(xs).writeln(); }
		public FastWriter writeln(long... xs) { return write(xs).writeln(); }
		public FastWriter writeln(IntUnaryOperator f, int... xs) { return write(f, xs).writeln(); }
		public FastWriter writeln(LongUnaryOperator f, long... xs) { return write(f, xs).writeln(); }
		public FastWriter writeln(char[] line) { return write(line).writeln(); }
		public FastWriter writeln(char[]... map) { for(char[] line : map)write(line).writeln();return this; }
		public FastWriter writeln(String s) { return write(s).writeln(); }

		private void innerflush()
		{
			try {
				out.write(buf, 0, ptr);
				ptr = 0;
			} catch (IOException e) {
				throw new RuntimeException("innerflush");
			}
		}

		public void flush()
		{
			innerflush();
			try {
				out.flush();
			} catch (IOException e) {
				throw new RuntimeException("flush");
			}
		}

		public FastWriter print(byte b) { return write(b); }
		public FastWriter print(char c) { return write(c); }
		public FastWriter print(char[] s) { return write(s); }
		public FastWriter print(String s) { return write(s); }
		public FastWriter print(int x) { return write(x); }
		public FastWriter print(long x) { return write(x); }
		public FastWriter print(double x, int precision) { return write(x, precision); }
		public FastWriter println(char c){ return writeln(c); }
		public FastWriter println(int x){ return writeln(x); }
		public FastWriter println(long x){ return writeln(x); }
		public FastWriter println(double x, int precision){ return writeln(x, precision); }
		public FastWriter print(int... xs) { return write(xs); }
		public FastWriter print(long... xs) { return write(xs); }
		public FastWriter print(IntUnaryOperator f, int... xs) { return write(f, xs); }
		public FastWriter print(LongUnaryOperator f, long... xs) { return write(f, xs); }
		public FastWriter println(int... xs) { return writeln(xs); }
		public FastWriter println(long... xs) { return writeln(xs); }
		public FastWriter println(IntUnaryOperator f, int... xs) { return writeln(f, xs); }
		public FastWriter println(LongUnaryOperator f, long... xs) { return writeln(f, xs); }
		public FastWriter println(char[] line) { return writeln(line); }
		public FastWriter println(char[]... map) { return writeln(map); }
		public FastWriter println(String s) { return writeln(s); }
		public FastWriter println() { return writeln(); }
	}

	public static void trnz(int... o)
	{
		for(int i = 0;i < o.length;i++)if(o[i] != 0)System.out.print(i+":"+o[i]+" ");
		System.out.println();
	}

	// print ids which are 1
	public static void trt(long... o)
	{
		Queue<Integer> stands = new ArrayDeque<>();
		for(int i = 0;i < o.length;i++){
			for(long x = o[i];x != 0;x &= x-1)stands.add(i<<6|Long.numberOfTrailingZeros(x));
		}
		System.out.println(stands);
	}

	public static void tf(boolean... r)
	{
		for(boolean x : r)System.out.print(x?'#':'.');
		System.out.println();
	}

	public static void tf(boolean[]... b)
	{
		for(boolean[] r : b) {
			for(boolean x : r)System.out.print(x?'#':'.');
			System.out.println();
		}
		System.out.println();
	}

	public void tf(long[]... b)
	{
		if(INPUT.length() != 0) {
			for (long[] r : b) {
				for (long x : r) {
					for (int i = 0; i < 64; i++) {
						System.out.print(x << ~i < 0 ? '#' : '.');
					}
				}
				System.out.println();
			}
			System.out.println();
		}
	}

	public void tf(long... b)
	{
		if(INPUT.length() != 0) {
			for (long x : b) {
				for (int i = 0; i < 64; i++) {
					System.out.print(x << ~i < 0 ? '#' : '.');
				}
			}
			System.out.println();
		}
	}

	private void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
}