#include<iostream>
#include<string>
using namespace std;
int main(){
    string N,M;
    int n,m,ans;
    cin >> N >> M;
    n = (int)N[N.length()-1]-48;
    m = (int)M[M.length()-1]-48;
    if(M == "1") ans = n;
    else{
        ans = n;
        for(int i=1;i<m;i++) ans = ans*n%10;
    }
    cout << ans << endl;
    return 0;
}