> #include <iostream>
> 
> using namespace std;
> 
> const int ptime=23,etime=28,itime=33;
> int p,e,i,d;
> int result,k,num=0;	
> 
> int main(){	
> 	cin>>p>>e>>i>>d;
> 	while(p!=-1&&e!=-1&&i!=-1&&d!=-1){
> 		++num;
> 		for(int ii=1;ii<=etime*itime;++ii){
> 
> 			result=(p+ptime*ii-e)%etime;
> 
> 			if(result==0){				
> 				result=(p+ptime*ii-i)%itime;
> 
> 				if(result==0){
> 					
> 					k=ii;
> 					goto lable;
> 				}
> 			}
> 		}
> 	lable: ;
> 
> 		result=p+ptime*k;
> 		if(result-d>21252)
> 			result-=21252;
> 		result-=d;
> 		cout<<"Case "<<num<<": the next triple peak occurs in "<<result<<" days."<<endl;
> 
> 
> 
> 		cin>>p>>e>>i>>d;
> 	}
> 	return 0;
> }