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

public class Main {
    final int maxn=1000100;
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        int T;
        T=in.nextInt();
        for(int i=1;i<=T;i++){
            BigInteger a,b,c;
            a=in.nextBigInteger();
            b=in.nextBigInteger();
            c=a.add(b);
            System.out.println("Case "+i+":");
            System.out.println(a.toString()+" + "+b.toString()+" = "+c.toString());
            if(i<T) System.out.println();
        }
    }
}