#include<iostream>
#include<string>
using namespace std;
string add(string a,string b){
	string result = "";
	int i=a.length()-1;
	int j = b.length()-1;
	int carry=0;
	while(i>=0||j>=0||carry>0){
		int sum=carry;
		if(i>=0){
			sum+=a[i]-'0';
			i--;
		}
		if(j>=0){
			sum+=b[j]-'0';
			j--;
		}
		carry=sum/10;
		result=char(sum%10+'0')+result;
	}
	return result;	
}
int main()
{
	int t;
	cin>>t;
	for(int c=1;c<=t;c++){
		string a,b;
		cin>>a>>b;
		string sum=add(a,b);
		cout<<"Case"<<" "<<c<<":"<<endl;
		cout<<a<<" "<<"+"<<" "<<b<<" "<<"="<<" "<<sum<<endl;
	}
	return 0;
 }