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

public class Main {

    public static void main(String[] args) {
     Scanner sc=new Scanner(System.in);    
     int n=sc.nextInt();
     int m=n;
     String result=null;
     while (n-->0){
         String x=sc.next();
         String y=sc.next();
         BigInteger b1=new BigInteger(x);
         BigInteger b2=new BigInteger(y);
         result=b1.add(b2).toString();
         System.out.println("Case"+" "+(m-n)+":");
         System.out.println(b1+" + "+b2+" = "+result);
         if(n!=0){
             System.out.println("");
         }
     }
   }
}