import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Iterator;


public class Main_yukicoder167 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        final int MOD = 10;

        String n = sc.next();
        String m = sc.next();
        
        int nn = mod(n, MOD);

        if (m.equals("0")) {
        	System.out.println("1");
        } else {
        	if (nn == 0) {
        		System.out.println("0");
        	} else {
        		int loop = mod(m, 4) - 1;
        		if (loop < 0) {
        			loop = 3;
        		}
        		int ret = nn;
        		for (int i = 0; i < loop; i++) {
        			ret *= nn;
        		}
        		
        		System.out.println(ret % MOD);
        	}
        }

        sc.close();
    }
    
    private static int mod(String x, int MOD) {
    	char[] xx = x.toCharArray();
    	long ret = 0;
    	for (int i = 0; i < xx.length; i++) {
    		ret *= 10;
    		ret += xx[i] - '0';
    		ret %= MOD;
    	}

    	return (int)ret;
    }

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;
		Iterator<String> it;
		
		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}
		
		String next() throws RuntimeException  {
			try {
				if (it == null || !it.hasNext()) {
					it = Arrays.asList(br.readLine().split(" ")).iterator();
				}
				return it.next();
			} catch (IOException e) {
				throw new IllegalStateException();
			}
		}
		
		int nextInt() throws RuntimeException {
			return Integer.parseInt(next());
		}

		long nextLong() throws RuntimeException {
			return Long.parseLong(next());
		}

		float nextFloat() throws RuntimeException {
			return Float.parseFloat(next());
		}

		double nextDouble() throws RuntimeException {
			return Double.parseDouble(next());
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new IllegalStateException();
			}
		}
	}
}