#include <iostream>
#include <string>
using namespace std;

int main() {
    string nstr, mstr;
    cin >> nstr >> mstr;
    int n = atoi(&nstr.back());
    int m = (mstr.length() > 2) ? stoi(mstr.substr(mstr.size()-2,2)) : stoi(mstr);
    m = (mstr.length() == 1 && m == 0) ? 0 : (m+3) % 4 + 1;
    int ans = 1;
    for (int i = 0; i < m; i++)
        ans = (ans * n) % 10;
    cout << ans << endl;
    return 0;
}