11021 A+B - 7

* BufferedReader, BufferedWriter, StringTokenizer

import java.io.*;
import java.util.StringTokenizer;

public class ab7_11021 {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		
		int num = Integer.parseInt(br.readLine());
		
		for(int i=1; i<=num; i++) {
			StringTokenizer token = new StringTokenizer(br.readLine());
			int a = Integer.parseInt(token.nextToken());
			int b = Integer.parseInt(token.nextToken());
			bw.append("Case #");
			bw.append(i+": ");
			bw.append(String.valueOf(a+b));
			bw.append("\n");
		}
		br.close();
		bw.flush();
		bw.close();
	}
}