import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        String s = sc.next();
        int n = s.charAt(s.length() - 1) - '0';
        char[] values = sc.next().toCharArray();
        int ans = 1;
        int base = n;
        for (int i = values.length - 1; i >= 0; i--) {
            ans *= pow(base, values[i] - '0');
            ans %= 10;
            base = pow(base, 10);
        }
        System.out.println(ans);
    }
    
    static int pow(int x, int p) {
        int ans = 1;
        for (int i = 0; i < p; i++) {
            ans *= x;
            ans %= 10;
        }
        return ans;
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}