import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int x = sc.nextInt();
for(int i=1; i<=x; i++){
int A = sc.nextInt();
int B = sc.nextInt();
System.out.println("Case #"+i+": " +(A+B));
}
sc.close();
}
}