import java.util.*;   
import java.io.*;   
import java.math.*;   
  
public class Main{   
    public static void main(String[] args) {   
        Scanner in = new Scanner(System.in);
        int t=in.nextInt();
        for(int i=1;i<=t;i++)
        {
            if(i!=1)
                System.out.println();
            BigInteger a = in.nextBigInteger();
            BigInteger b = in.nextBigInteger();
            System.out.println("Case "+i+":");
            System.out.println(a+" + "+b+" = "+a.add(b));
        }
    }   
}