#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;
}
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