#include <stdio.h>
#include <string.h>

int main(void)
{
    char N[10002], M[10002];
    int N_length, M_length, tmp;
    scanf("%s%s", N, M);
    N_length = strlen(N);
    M_length = strlen(M);
    if (M[0] == '0') puts("1");
    else if (N[N_length - 1] == '0') puts("0");
    else {
        if (N[N_length - 1] == '1' || N[N_length - 1] == '5' || N[N_length - 1] == '6') printf("%c", N[N_length - 1]);
        else if (N[N_length - 1] == '4' || N[N_length - 1] == '9') {
            if ((M[M_length - 1] - '0') % 2) printf("%c", N[N_length - 1]);
            else {
                if (N[N_length - 1] == '4') puts("6");
                else puts("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) puts("2");
                else if (tmp % 4 == 2) puts("4");
                else if (tmp % 4 == 3) puts("8");
                else puts("6");
            }
            else if (N[N_length - 1] == '3') {
                if (tmp % 4 == 1) puts("3");
                else if (tmp % 4 == 2) puts("9");
                else if (tmp % 4 == 3) puts("7");
                else puts("1");
            }
            else if (N[N_length - 1] == '7') {
                if (tmp % 4 == 1) puts("7");
                else if (tmp % 4 == 2) puts("9");
                else if (tmp % 4 == 3) puts("3");
                else puts("1");
            }
            else {
                if (tmp % 4 == 1) puts("8");
                else if (tmp % 4 == 2) puts("4");
                else if (tmp % 4 == 3) puts("2");
                else puts("6");
            }
        }
    }
    return 0;
}