#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    string N,M; cin >> N >> M;
    if(M == "0") {
        cout << 1 << endl;
        return 0;
    }
    reverse(M.begin(), M.end());
    while(M.size() > 2u) M.pop_back();
    reverse(M.begin(), M.end());
    int m4 = stoi(M) % 4;
    int n10 = N.back() - '0';
    if(n10 == 0) {
        cout << 0 << endl;
    } else {
        cout << int(pow(n10, m4 + 4)) % 10 << endl;
    }
}