import java.io.*;

import java.util.*; 

import java.math.*;

import java.lang.*;

import java.text.*; 

class Main

{

    public static void main(String[] argc)

    {

        Scanner cin=new Scanner(System.in);

        BigInteger a,b,sum;

        a=BigInteger.valueOf(0);

        b=BigInteger.valueOf(0);

        sum=BigInteger.valueOf(0);

        int n,i=1;

        n=cin.nextInt();

        while(cin.hasNext())

        {

            while(n--!=0)

            {

                a=cin.nextBigInteger();

                b=cin.nextBigInteger();

                sum=a.add(b);

                System.out.println("Case "+ i +":");

                System.out.println(a + " + " + b + " = " + sum);

                if(n!=0)System.out.println();

                i++;

            }

        }

    }

}