using System;
using System.Numerics;

namespace No167_1{
    public class Program{
        public static void Main(string[] args){
            const int mod = 10;
            var n = Console.ReadLine();
            var m = BigInteger.Parse(Console.ReadLine());
            
            Console.WriteLine(BigInteger.ModPow(n[n.Length - 1] - '0', m, mod));
        }
    }
}