I=input
n,m=int(I()),int(I())
print([[0,0,0,0],[1,1,1,1],[2,4,8,6],[3,9,7,1],[4,6,4,6],[5,5,5,5],[6,6,6,6],[7,9,3,1],[8,4,2,6],[9,1,9,1]][n%10][(m-1)%4]if m!=0else 1)