import sys, math
sys.set_int_max_str_digits(0)
INF = 10**18
MOD = 998244353

N = input()
M = input()

if M == '0':
    exit(print(1))
if N[-1] == '0':
    exit(print(0))

N = int(N[-1])
M = int(M[-2:])
ans = pow(N, M, 10)
print(ans)