package hdoj;

import java.util.*;
import java.math.*;

public class Main {
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        int T;
        int  n=1;
        T = input.nextInt();
        while(n<=T){
            BigInteger a,b;
            a = input.nextBigInteger();
            b = input.nextBigInteger();
            System.out.println("Case " + n + ":" );
            System.out.println(a + " + " + b + " = "  + (a.add(b)));
            if(n!=T)System.out.println();    
            n++;
        }
    }
}