#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <cmath>
#include <algorithm>
#include <iomanip>
#include <queue>
using ll = long long;
using namespace std;
int main(void)
{
    string s, t;
    cin >> s >> t;
    int n = s.size();
    int m = t.size();
    int tmp = s[n - 1] - '0';
    int num = (t[m - 2] - '0') * 10 + (t[m - 1] - '0');
    num %= 4;

    //cout << tmp << " " << num << endl;
    int ababa = (int)pow(tmp, num) % 10;
    cout << ababa << endl;
    return 0;
}