N = int(input())
M = int(input())

zyunkai=[
    [0],
    [1],
    [6,2,4,8],
    [1,3,9,7],
    [6,4],
    [5],
    [6],
    [1,7,9,3],
    [6,8,4,2],
    [1,9]
    ]

Nmod10=N%10

if M==0:
    ans=1
else:
    ans=zyunkai[Nmod10][M%len(zyunkai[Nmod10])]
print(ans)