N = input()
M = input()

N = N%10

if M == 0:
    print 1
    exit()

if N == 1:
    ans = 1
elif N == 2:
    ans = [2, 4, 8, 6][M%4-1]
elif N == 3:
    ans = [3, 9, 7, 1][M%4-1]
elif N == 4:
    ans = [4, 6][M%2-1]
elif N == 5:
    ans = 5
elif N == 6:
    ans = 6
elif N == 7:
    ans = [7, 9, 3, 1][M%4-1]
elif N == 8:
    ans = [8, 4, 2, 6][M%4-1]
elif N == 9:
    ans = [9, 1][M%2-1]
elif N == 0:
    ans = 0

print ans