#include <iostream>
#include <cmath>
using namespace std;
int main(){
ios::sync_with_stdio(0);
int b,s;
int cs=1;
while(cin>>b>>s&&b){
cout<<"Case "<<cs++<<": ";
if(b==1){
cout<<":-\\"<<endl;
continue;
}
double pre,pos;
pre=min(1.0,(double)s/b),pos=min(1.0,(double)(s-1)/(b-1));
if(pre>pos)
cout<<":-("<<endl;
else if(pre==pos)
cout<<":-|"<<endl;
else
cout<<":-)"<<endl;
}
}
#include <cmath>
using namespace std;
int main(){
ios::sync_with_stdio(0);
int b,s;
int cs=1;
while(cin>>b>>s&&b){
cout<<"Case "<<cs++<<": ";
if(b==1){
cout<<":-\\"<<endl;
continue;
}
double pre,pos;
pre=min(1.0,(double)s/b),pos=min(1.0,(double)(s-1)/(b-1));
if(pre>pos)
cout<<":-("<<endl;
else if(pre==pos)
cout<<":-|"<<endl;
else
cout<<":-)"<<endl;
}
}
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