import java.math.BigInteger;
import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		int temp,flag=n;
		BigInteger a,b,c;
		while(n!=0)
			{
			a=sc.nextBigInteger();
			b=sc.nextBigInteger();
			c=add(a,b);
			temp=flag-n+1;
			System.out.println("Case "+temp+":");
			System.out.println(a+" + "+b+" = "+c);
			n=n-1;
			if(n!=0){System.out.println("");}
			}
	}
	public static BigInteger add(BigInteger a,BigInteger b)
	{
		BigInteger c=a.add(b);
		return c;
	}
}

//java/8172