1 import java.util.*;    
 2 import java.math.*;    
 3 import java.io.*;    
 4 public class  Main       
 5 {    
 6     public static void main( String[] args  )    
 7     {    
 8        Scanner cin=new Scanner(new BufferedInputStream (System.in)  );      
 9        BigInteger a,b,c;                     
10        int t,num=0;    
11        t=cin.nextInt();                    
12        while( t-->=1 )    
13        {    
14            num++;     
15            a=cin.nextBigInteger();                
16            b=cin.nextBigInteger();    
17            c=a.add(b);    
18            System.out.println("Case "+num+":");            
19            System.out.println(a + " + " + b + " = "+c);    
20            if(t!=0)System.out.println("");    
21        }    
22     }    
23 }