#include <iostream>
using namespace std;

int main() {
	// your code goes here
	int T, a, b;
	//T <= 125;
	//0 <= a <= 10;
	//0 <= b <= 10;
	cin >> T;
	for (int i = 1; i <= T; i++) {
		cin >> a >> b;
		cout << "Case " << i << ": " << a+b << "\n";
	}
	
	return 0;
}