hdu1002

import java.math.BigInteger;
import java.util.Scanner;


public class Main {

public static void main(String args[]){
BigInteger a,b;
int t;
Scanner in = new Scanner(System.in);
t=in.nextInt();
for(int i = 1; i <= t; i++){
System.out.println("Case" + " " + i + ":");
a=in.nextBigInteger();
b=in.nextBigInteger();
if(i < t){
System.out.println(a + " + " + b + " = " + a.add(b) );
                System.out.println();
            } else {
                System.out.println(a + " + " + b + " = " + a.add(b));
}
}
}
}