hdu 1002

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

public class Main {
	public static void main(String[] args) {
		Scanner sc= new Scanner(System.in);
		BigInteger a,b;
		while(sc.hasNext()) {
			int n=sc.nextInt();
			for(int i=1;i<=n;i++){
				a = sc.nextBigInteger();
				b = sc.nextBigInteger();
				if (i < n) {
					System.out.println("Case "+i+":");
	                System.out.println(a + " + " + b + " = " + a.add(b) );
	                System.out.println();
	            } else {
	            	System.out.println("Case "+i+":");
	                System.out.println(a + " + " + b + " = " + a.add(b));
	            }
			}
		}
		sc.close();
	}
}