#include<iostream>
using namespace std;

int Pow(int number, int onPow) {
	return pow(number, onPow);
}

int GetLastDigit(int number) {
	return number % 10;
}

int main() {
	int a, b,c;
	cin >> c;
	for (int i = 0; i < c; i++) {
		cin >> a >> b;
		cout << "Number:"<<a<<" on pow "<<b<<"\tLast digit:" << GetLastDigit(Pow(a, b)) << endl;
	}

	system("Pause>0");
	return 0;
}