#include<bits/stdc++.h>
#define ll long long int
using namespace std;
int main()
{
ll n, m, i = 1;
while(cin >> n >> m && n != 0 && m != 0)
{
ll c = 1;
cout << "Case " << i++ << ": ";
if(n-1 == 0)
{
cout << ":-\\" << endl;
continue;
}
ll d = (m-1)/(n-1);
if(d < c)
cout << ":-(" << endl;
if(d >= c)
cout << ":-|" << endl;
}
return 0;
}
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