> #include <iostream>
> #include <vector>
> using namespace std;
> 
> int main()
> {
> 	int p,e,i,d;
> 	vector<int> vp,ve,vi,vd;
> 	unsigned int k;
> 	int count=1;
> 	while(1)
> 	{
> 		cin>>p>>e>>i>>d;
> 		if(p==-1&&e==-1&&i==-1&&d==-1)
> 			break;
> 		vp.push_back(p%23);
> 		ve.push_back(e%28);
> 		vi.push_back(i%33);
> 		vd.push_back(d);
> 	}//end of input
> 	for(k=0;k<vd.size();k++)
> 	{
> 		for(int j=1;j<=21252;j++)
> 		{
> 			if((vd[k]+j)%23==vp[k]&&(j+vd[k])%28==ve[k]&&(j+vd[k])%33==vi[k])
> 			{
> 				cout<<"case "<<count++<<": the next triple peak occurs in "
> 					<<j<<" days."<<endl;
> 				break;
> 			}
> 		}
> 	}
> 
> 	return 0;
> }
>