#include <bits/stdc++.h>
using namespace std;
int main() {
    #define DEBUG
    #ifdef DEBUG
    std::ifstream in("/home/share/inputf.in");
    std::cin.rdbuf(in.rdbuf());
    #endif
    string N, M;
    cin >> N >> M;
    int n = N.back() - 0x30;
    int m = stoi(M.substr(max<int>(M.length() - 2, 0)));
    if(m != 0) m = (m % 4) + 4;
    int ans = (int)pow(n, m) % 10;
    cout << ans << endl;
    return 0;
}