#include <iostream>
#include <algorithm>
#include <string>

void solve() {
    std::string s, t;
    std::cin >> s >> t;

    if (t == "0") {
        std::cout << 1 << std::endl;
        return;
    }

    std::reverse(s.begin(), s.end());
    s.resize(1);
    std::reverse(s.begin(), s.end());

    std::reverse(t.begin(), t.end());
    t.resize(2, '0');
    std::reverse(t.begin(), t.end());

    int n = std::stoi(s),
        m = std::stoi(t) + 100;

    if (n == 0) {
        std::cout << 0 << std::endl;
        return;
    }

    int ans = 1;
    for (int i = 0; i < m; ++i) {
        (ans *= n) %= 10;
    }

    std::cout << ans << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}