#include<stdio.h>

void power(int a, int b){

        int sum=1;
        while(b>0){
                if(b & 0b00000001){
                        sum=(sum*a)%100;
                        b--;
                }
                a*=a;
                b/=2;
                if(a>100)
                        a%=100;
        }
        printf("suma: %d %d\n",sum,sum%10);
}


int main(){

        int amount,a,b;

        scanf("%d",&amount);

        for(int counter=0;counter<amount;counter++){
        scanf("%d %d",&a,&b);
        power(a,b);
        }

        return 0;
}