Greetings-from-Lightoj.

//Problem 1:

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t,a,b;
    cin>>t;
    for(int i=0;i<t;i++)
    {
        cin>>a>>b;
        cout<<"Case"<<" "<<i+1<<":"<<" "<<(a+b)<<endl;
    }
}