#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    string s, t;
    cin >> s >> t;
    if(t == "0"){
        cout << 1 << endl;
        return 0;
    }
    t = "0" + t;

    int n = stoi(s.substr(s.size() - 1));
    int m = stoi(t.substr(t.size() - 2)) + 4;

    int x = n;
    for(int i=1; i<m; ++i){
        x *= n;
        x %= 10;
    }
    cout << x << endl;

    return 0;
}