#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
using ll = long long;

int main() {
    string n, m;
    cin >> n >> m;
    if (m == "0")cout << 1 << endl;
    else {
        int x = n.back() - '0';
        int y = 0;
        for (int i = 0; i < m.size(); i++) {
            y *= 10, y %= 3628800;
            y += m[i] - '0', y %= 3628800;
        }

        if (y == 0)y = 3628800;

        int ret = 1;
        for (int i = 0; i < y; i++) {
            ret *= x, ret %= 10;
        }
        cout << ret << endl;
    }
    return 0;
}