c#include <bits/stdc++.h> using namespace std; int main() { cin.tie(NULL); cout.tie(NULL); ios_base::sync_with_stdio(false); int T; cin >> T; for(int i = 1; i <= T; i++){ int A, B; cin >> A >> B; cout << "Case " << i << ": "; cout << A + B << "\n"; } return 0; }