#include <bits/stdc++.h>
using namespace std;

int main() {
    string N, M;
    cin >> N >> M;

    int n, m;
    n = N.back() - '0';
    m = M.back() - '0';

    if (M == "0") {
        cout << 1 << endl;
        return 0;
    }

    if (M.size() >= 2) {
        m += 10 * (int)(M[M.size() - 2] - '0');
    }

    int ans = n * n * n * n;
    ans %= 10;
    while (m--)
        (ans *= n) %= 10;

    cout << ans << endl;
}