using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Numerics;

namespace foryuki
{
    class Program
    {
        static void Main(string[] args)
        {
            string N = Console.ReadLine();
            string M = Console.ReadLine();

            BigInteger n = BigInteger.Parse(N);
            BigInteger m = BigInteger.Parse(M);

            BigInteger ans= 1;
            for (int i = 0; i < m; i++)
            {
                ans = ans * n;
            }

            Console.WriteLine(ans % 10);
            Console.ReadLine();
        }

        //-------------------------------------------------------------

        static int[] ConvertStringArrayToIntArray(string[] array)
        {
            return Array.ConvertAll(array, str => int.Parse(str));
        }

        static List<int> ConvertStringArrayToIntList(string[] str)
        {
            var list = new List<int>();
            foreach (var c in str)
            {
                list.Add(int.Parse(c));
            }
            return list;
        }
    }
}