#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t,x;
    cin>>t;
    for(int i=1;i<=t;i++)
    {
        int x;
        cin>>x;
        int sum=0;

     for(int j=1;j<=x;j++)
     {
        int y;
        if(y>=0)
        {
            cin>>y;
        sum=(sum+y);
        }
     }
     cout<<"Case"<<" "<<i<<":"<<" "<<sum<<endl;
    }
    return 1;
    }