#include<stdio.h>
#include<math.h>
int main()
{
	long long int a,b,x,sum=0,t;
	 while(scanf("%lld %lld",&a,&b)!=EOF)
	 {
	 	sum=0;
	 	x=pow(a,b);
	    while(x!=0)
	    {
		t=x;
		x=x/10;
		t=t%10;
		sum+=t;
	    }
	     printf("%lld\n",sum);
	  }
		
}