import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
	      BufferedReader stdReader =new BufferedReader(new InputStreamReader(System.in));
	      try {
	    	  int x = Integer.parseInt(stdReader.readLine());
	    	  int N = Integer.parseInt(stdReader.readLine());
	    	  int ans = pow(x, N,10) % 10;
	    	  System.out.println(ans);
	      } catch (IOException e) {
			e.printStackTrace();
	      }
	}
	public static int pow(int x,int n,int m){
		long temp = x;
		long ans = 1;
		while(n>0){
			if(n%2==0){
				temp = temp*temp % m;
				n /= 2;
			}else{
				n -= 1;
				ans = ans *temp % m;
			}
		}		
		return (int)ans;
	}
}