#include <iostream>
#include <cstring>
using namespace std;

int main() {
    char N[10002], M[10002];
    int N_length, M_length, tmp;
    cin >> N >> M;
    N_length = strlen(N);
    M_length = strlen(M);
    if (M[0] == '0') cout << 1;
    else if (N[N_length - 1] == '0') cout << 0;
    else {
        if (N[N_length - 1] == '1' || N[N_length - 1] == '5' || N[N_length - 1] == '6') cout << N[N_length - 1];
        else if (N[N_length - 1] == '4' || N[N_length - 1] == '9') {
            if ((M[M_length - 1] - '0') % 2) cout << N[N_length - 1];
            else {
                if (N[N_length - 1] == '4') cout << 6;
                else cout << 1;
            }
        }
        else {
            if (M_length == 1) tmp = M[0] - '0';
            else tmp = 10 * (M[M_length - 2] - '0') + M[M_length - 1] - '0';
            if (N[N_length - 1] == '2') {
                if (tmp % 4 == 1) cout << 2;
                else if (tmp % 4 == 2) cout << 4;
                else if (tmp % 4 == 3) cout << 8;
                else cout << 6;
            }
            else if (N[N_length - 1] == '3') {
                if (tmp % 4 == 1) cout << 3;
                else if (tmp % 4 == 2) cout << 9;
                else if (tmp % 4 == 3) cout << 7;
                else cout << 1;
            }
            else if (N[N_length - 1] == '7') {
                if (tmp % 4 == 1) cout << 7;
                else if (tmp % 4 == 2) cout << 9;
                else if (tmp % 4 == 3) cout << 3;
                else cout << 1;
            }
            else {
                if (tmp % 4 == 1) cout << 8;
                else if (tmp % 4 == 2) cout << 4;
                else if (tmp % 4 == 3) cout << 2;
                else cout << 6;
            }
        }
    }
}