import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.InputMismatchException;
import java.util.PriorityQueue;

public class Q400U {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		long[] s = new long[26];
		for(int i = 0;i < 26;i++){
			s[i] = nl();
			if(s[i] < 0 || s[i] > 1_000_000_000_000_000_000L)throw new RuntimeException("s[i] out of range");
		}
		char[] t = ns().toCharArray();
		if(t.length < 1 || t.length > 1_000_000)throw new RuntimeException("t out of range");
		for(char c : t){
			if(!('a' <= c && c <= 'z'))throw new RuntimeException("t invalid char");
		}
		int n = t.length;
		
		// 0?
		int[] freq = new int[26];
		for(char c : t){
			freq[c-'a']++;
		}
		for(int i = 0;i < 26;i++){
			if(s[i] < freq[i]){
				out.println(0);
				return;
			}
		}
		
		long ret = 1;
		double retd = 1;
		
		int[] lens = new int[n+1];
		for(char x = 'a';x <= 'z';x++){
			int xi = x-'a';
			int len = 0;
			int p = 0;
			for(int i = 0;i < n;i++){
				if(t[i] == x){
					len++;
				}else{
					if(len > 0)lens[p++] = len;
					len = 0;
				}
			}
			if(len > 0)lens[p++] = len;
			if(p == 0)continue;
			
			if(p == 1 && lens[0] == 1){
				// 1
				ret *= s[xi];
				retd *= s[xi];
				if(retd > 3L<<61 || ret >= 1L<<62){
					out.println("hel"); return;
				}
				continue;
			}
			if(p == 1 && lens[0] == 2){
				// 2
				if(s[xi] >= 5_000_000_000L){
					out.println("hel"); return;
				}
				long w0 = s[xi];
				long w1 = s[xi]-1;
				if(w0 % 2 == 0){
					w0 /= 2;
				}else{
					w1 /= 2;
				}
				ret *= w0 * w1;
				retd *= w0 * w1;
				if(retd > 3L<<61 || ret >= 1L<<62){
					out.println("hel"); return;
				}
				continue;
			}
			if(p == 2 && lens[0] == 1 && lens[1] == 1){
				// 1 1
				long w0 = s[xi]/2;
				long w1 = (s[xi]+1)/2;
				if(w0 >= 3_000_000_000L){
					out.println("hel"); return;
				}
				ret *= w0 * w1;
				retd *= w0 * w1;
				if(retd > 3L<<61 || ret >= 1L<<62){
					out.println("hel"); return;
				}
				continue;
			}
			
			for(int i = 0;i < p;i++){
				s[xi] -= lens[i];
			}
			if(s[xi] < 0){
				// impossible
				out.println(0);
				return;
			}
			
			// {v, d}
			PriorityQueue<int[]> pq = new PriorityQueue<>(10000, new Comparator<int[]>(){
				public int compare(int[] a, int[] b){
					// (v1+d1)/d1 >= (v2+d2)/d2
					return -Long.compare((long)a[0]*(b[1]+1), (long)b[0]*(a[1]+1));
				}
			});
			for(int i = 0;i < p;i++){
				pq.add(new int[]{lens[i], 0});
			}
			
			double lretd = retd;
			while(!pq.isEmpty() && s[xi] > 0){
				int[] cur = pq.poll();
				cur[1]++;
				long g = gcd(cur[0]+cur[1], cur[1]);
				lretd = lretd * (cur[0] + cur[1]) / cur[1];
				ret = ret / (cur[1]/g) * ((cur[0]+cur[1])/g);
				if(lretd >= 3L<<61 || ret >= 1L<<62){
					out.println("hel"); return;
				}
				pq.add(cur);
				s[xi]--;
			}
		}
		out.println(ret);
	}
	
	public static long gcd(long a, long b) {
		while (b > 0) {
			long c = a;
			a = b;
			b = c % b;
		}
		return a;
	}
	
	
	void run() throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-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();
	}
	
	public static void main(String[] args) throws Exception { new Q400U().run(); }
	
	private byte[] inbuf = new byte[1024];
	private 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 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))){ // when nextLine, (isSpaceChar(b) && 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 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 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[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	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();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}