import std.stdio, std.conv, std.functional, std.string;
import std.algorithm, std.array, std.container, std.range, std.typecons;
import std.bigint, std.numeric, std.math, std.random;
import core.bitop;

string FMT_F = "%.10f";

static File _f;
void file_io(string fn) { _f = File(fn, "r"); }
static string[] s_rd;
T _RD(T = long)() { while(!s_rd.length) s_rd = readln.chomp.split; string res = s_rd[0]; s_rd.popFront; return res.to!T; }
T _RD(T = long)(File f) { while(!s_rd.length) s_rd = f.readln.chomp.split; string res = s_rd[0]; s_rd.popFront; return res.to!T; }
T[] _RDA(T = long)(T fix = 0) { auto r = readln.chomp.split.to!(T[]); r[] += fix; return r; }
T[] _RDA(T = long)(File f, T fix = 0) { auto r = f.readln.chomp.split.to!(T[]); r[] += fix; return r; }
T RD(T = long)() { if (_f.isOpen) return _RD!T(_f); else return _RD!T; }
T[] RDA(T = long)(T fix = 0) { if (_f.isOpen)  return _RDA!T(_f, fix); else return _RDA!T(fix); }

size_t[] MAKE_IDX(alias less = "a < b", Range)(Range range) { auto idx = new size_t[](range.length); makeIndex!(less)(range, idx); return idx;}
size_t MIN_POS(alias less = "a < b", Range)(Range range) { auto r = minPos!(less)(range); return range.length - r.length; }

void chmin(T)(ref T x, T y) { x = min(x, y); } void chmax(T)(ref T x, T y) { x = max(x, y); }
bool inside(T)(T x, T b, T e) { return x >= b && x < e; }
T lcm(T)(T x, T y) { return x * (y / gcd(x, y)); }

//long mod = 10^^9 + 7;
long mod = 998_244_353;
//long mod = 1_000_003;
void moda(ref long x, long y) { x = (x + y) % mod; }
void mods(ref long x, long y) { x = ((x + mod) - (y % mod)) % mod; }
void modm(ref long x, long y) { x = (x * y) % mod; }
void modpow(ref long x, long y) { if (!y) { x = 1; return; } auto t = x; x.modpow(y>>1); x.modm(x); if (y&1) x.modm(t); }
void modd(ref long x, long y) { y.modpow(mod - 2); x.modm(y); }

void main()
{
	auto W = RD;
	auto H = RD;
	auto X = RD;

	long[][] ans;
	bool isSwap;
	if (X <= 18)
	{
		if (W % 3 == 2 || H % 2 == 2)
		{
			if (W % 3 != 2)
			{
				isSwap = true;
				swap(H, W);
			}

			auto a = min(9, X);
			auto b = max(0, X-9);

			ans = new long[][](H, W);
			foreach (y; 0..H)
			{
				if (y % 2) continue;
				foreach (x; 0..W)
				{
					if (x % 3 == 0)
						ans[y][x] = a;
					else if (x % 3 == 1)
						ans[y][x] = b;
				}
			}
		}
	}
	else if (X <= 36)
	{
		if (W % 3 == 2 && H % 2 == 2)
		{
			auto a = 9;
			auto b = 9;
			auto c = min(9, X-18);
			auto d = max(0, X-27);

			ans = new long[][](H, W);
			foreach (y; 0..H)
			{
				if (y % 3 == 2) continue;
				foreach (x; 0..W)
				{
					if (x % 3 == 0)
					{
						if (y % 3 == 0)
							ans[y][x] = a;
						else
							ans[y][x] = c;
					}
					else if (x % 3 == 1)
					{
						if (y % 3 == 0)
							ans[y][x] = b;
						else
							ans[y][x] = d;
					}
				}
			}
		}
	}

	if (ans.empty)
		writeln(-1);
	else if (isSwap)
	{
		foreach (x; 0..W)
		{
			foreach (y; 0..H)
			{
				write(ans[y][x]);
			}
			writeln;
		}
	}
	else
	{
		foreach (y; 0..H)
			ans[y].map!(to!string).join("").writeln;
	}

	stdout.flush;
	debug readln;
}