using System.Numerics;
using System;

public class Hello
{
    static void Main()
    {
        var s = Console.ReadLine().Trim();
        var n = s[s.Length - 1] - '0';
        BigInteger m2 = BigInteger.Parse(Console.ReadLine().Trim());
        if (m2 == 0) { Console.WriteLine(1); goto exit; }
        if (n == 0) { Console.WriteLine(0); goto exit; }
        var m3 = m2 % 4;
        var m = (int)m3;
        if (m == 0) m = 3;
        else m--;
        var map = makeMap();
        Console.WriteLine(map[n,m]);
    exit:;
    }
    static int[,] makeMap()
    {
        var map = new int[10, 4];
        for (int i = 0; i < 10; i++) map[i, 0] = i;
        for (int i = 0; i < 10; i++)
            for (int j = 1; j < 4; j++)
                map[i, j] = (map[i, j - 1] * i) % 10;
        return map;
    }
}