#include <iostream>
#include <fstream>

#define Mod 10

using namespace std;

ifstream fin("lgput.in");
ofstream fout("lgput.out");

void LOG(int baza, int exp)
{
    int res = 1;

    while(exp > 1)
    {
        if(exp % 2 == 1)
            res = (res * baza) % Mod;
        baza *= baza;
        exp /= 2;
    }
    cout << (res * baza) % Mod;
}

int main()
{
    int baza, exp;

    fin >> baza >> exp;
    LOG(baza, exp);
    return 0;
}