# -*- coding:utf-8 -*-
M = 10
def my_pow(x, n, mod):
    ret = 1
    while 0 < n:
        if n % 2 == 0:
            x *= x % mod
            n >>= 1
        else:
            ret *= x % mod
            n -= 1
    return ret
if __name__ == '__main__':
    n = int(input())
    m = int(input())
    print(my_pow(n, m, M) % M)