#include <iostream>
using namespace std;
int main(){
    string n,m;cin>>n>>m;
    if(m == "0"){
        cout << 0 << endl;
        return 0;
    }
    int N = n[n.size()-1]-'0';
    int M;
    if(m.size() == 1){
        M = m[0]-'0';
    }else{
        M = (m[m.size()-2]-'0')*10 + m[m.size()-1]-'0';
    }
    M %= 4;
    int ans = N;
    for(int i = 0; M > i; i++){
        ans = (N*ans)%10;
    }
    cout << ans << endl;
}