baekjoon

#include <stdio.h>

int main(){
    int n, i, a, b, ans;
    scanf("%d", &n);
    for(i = 0; i < n; i++){
        scanf("%d %d", &a, &b);
        ans = a + b;
        printf("Case #%d: %d\n", i+1, ans);
    }
    return 0;
}

#include <iostream>

int main(){
    int n, a, b, ans;
    std::cin>>n;
    for(int i = 0; i < n; i++){
        std::cin>>a>>b;
        ans = a + b;
        std::cout<<"Case #"<<i+1<<": "<<ans<<std::endl;
    }
    return 0;
}

import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		for(int i = 1; i <= n; i++){
		    int a = sc.nextInt();
		    int b = sc.nextInt();
		    int ans = a+b;
		    System.out.println("Case #"+ i + ": " + ans);
		}
	}
}

n = int(input())
for i in range(n):
    a,b = map(int, input().split())
    ans = a + b
    print("Case #%s: %s"%(i+1, ans))