# -*- coding:utf-8 -*-
mp = {
    0: [0],
    1: [1],
    2: [2, 4, 8, 6],
    3: [3, 9, 7, 1],
    4: [4, 6],
    5: [5],
    6: [6],
    7: [7, 9, 3, 1],
    8: [8, 4, 2, 6],
    9: [9, 1]
}
if __name__ == '__main__':
    n = int(input())
    m = int(input())
    n %= 10
    print(mp[n][m % len(mp[n]) - 1])