#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    string n, m;
    cin >> n >> m;

    if(m == "0"){
        cout << 1 << endl;
        return 0;
    }

    int a = n[n.size() - 1] - '0';

    int b = 0;
    rep(i,m.size()){
        b *= 10;
        b += m[i] - '0';
        b %= 4;
    }
    b = (b + 3) % 4;

    int ans = a;
    rep(i,b){
        ans *= a;
        ans %= 10;
    }

    cout << ans << endl;
    return 0;
}