> #include <iostream>
> using namespace std;
> int  main(){
> int days[1000];int num=0;
> int a,b,c,d;
> while(cin>>a>>b>>c>>d)
> {
> if(a==-1&&b==-1&&c==-1&&d==-1)
> break;
> else
> {
> 	do{
> if(a<=b&&a<=c)
> a+=23;
> else if(b<=a&&b<=c)
> b+=28;
> else if(c<=b&&c<=a)
> c+=33;
> 	}while(a!=b||a!=c);
> days[num]=a-d;
> num++;
> }}
> for(int i=0;i<num;i++)
> cout<<"Case "<<(i+1)<<": the next triple peak occurs in "<<days[i]<<" days."<<endl;
> return 0;