N = input().strip()
M = input().strip()
n = int(N[-1])
k = 1
x = (n**2)%10
k = 2
while x!=n:
    k += 1
    x = (x*n)%10
T = k-1
if M=="0" or N=="1":
    print(1)
else:
    m = int(M)%T
    if m==0:
        m = T
    k = 1
    x = n
    while k<m:
        x = (x*n)%10
        k += 1
    print(x)