using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        var N = rs();
        var M = rs();

        var n = int.Parse(N[N.Length - 1].ToString());
        int m;
        if (M.Length == 1)
            m = int.Parse(M);
        else
            m = int.Parse(M[M.Length - 2].ToString() + M[M.Length - 1]);

        if (m == 0 && M.Length == 1)
        {
            Console.WriteLine(1);
            return;
        }

        m %= 4;

        if (m == 0) m += 4;

        Console.WriteLine(Math.Pow(n, m) % 10);
    }

    #region Scan
    static int ri() { return int.Parse(Console.ReadLine()); }
    static long rl() { return long.Parse(Console.ReadLine()); }
    static double rd() { return double.Parse(Console.ReadLine()); }
    static string rs() { return Console.ReadLine(); }
    static int[] ria() { return Console.ReadLine().Trim().Split().Select(int.Parse).ToArray(); }
    static long[] rla() { return Console.ReadLine().Trim().Split().Select(long.Parse).ToArray(); }
    static double[] rda() { return Console.ReadLine().Trim().Split().Select(double.Parse).ToArray(); }
    static string[] rsa() { return Console.ReadLine().Trim().Split(); }
    static void mul(out int a, out int b) { var arr = ria(); a = arr[0]; b = arr[1]; }
    public void mul(out int a, out int b, out int c) { var arr = ria(); a = arr[0]; b = arr[1]; c = arr[2]; }
    public void mul(out int a, out int b, out int c, out int d) { var arr = ria(); a = arr[0]; b = arr[1]; c = arr[2]; d = arr[3]; }
    #endregion
}