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();
System.out.println("Case #" + i + ": " + (a + b));
}
sc.close();
}
}