//11597
#include<iostream>
#include<cstdlib>
#include<stdio.h>
#include<vector>
#include<algorithm>
using namespace std;
int main()
{
int n,i=1;
while(scanf("%d",&n)==1)
{
if(n==0)
break;
printf("Case %d: %d\n",i,n/2); //like 11550
i++;
}
}
