N = input().strip()
n = int(N[-1])
cur = n
T = 1
while True:
    ncur = (cur*n)%10
    if ncur==n:break
    T += 1
    cur = ncur
M = list(map(int,list(input())))
if M[0]==0:
    print(1)
else:
    dp = [0 for _ in range(len(M))]
    dp[0] = M[0]%10
    for i in range(1,len(M)):
        dp[i] = (dp[i-1]*10+M[i])%T
    ans = n
    if dp[-1]==0:
        dp[-1]=T
    for i in range(1,dp[len(M)-1]):
        ans = (ans*n)%10
    print(ans)