#include"stdio.h"int qpow(int a,int b){ int s=1; while(b) { if(b%2)s=(s*a)%10; a=(a*a)%10; b=b>>1; } return s%10;}int main( ){ int a,b; while(scanf("%d%d",&a,&b)==2) { printf("%d\n",qpow(a%10,b)); } return 0;}