poj1006

import java.util.Scanner;
public class Main{
	 public static void main(String[] args){
   	  Scanner sc=new Scanner(System.in);
   	  int count=1;
   	  while(sc.hasNext()){
   		  int p=sc.nextInt();
   		  int e=sc.nextInt();
   		  int i=sc.nextInt();
   		  int d=sc.nextInt();
   		  if(p==-1&&e==-1&&i==-1&&d==-1){
   			  break;
   		  }
   		 int yuand=d;
   		 if(d==0){
   				d++;
   				while((d-p)%23!=0) d++;
   				int oriday=d;
   				while(oriday<=d+21252){
   					if((oriday-e)%28==0){
   						if((oriday-i)%33==0){
    						  System.out.println("Case "+(count++)+": the next triple peak occurs in "+(oriday-yuand)+" days.");
    						  break;
    					    }
   					}
   					oriday+=23;
   				}	
     	 }else{
     		while((d-p)%23!=0) d++;
				int oriday=d;
				while(oriday<=d+21252){
					if((oriday-e)%28==0){
						if((oriday-i)%33==0){
						  System.out.println("Case "+(count++)+": the next triple peak occurs in "+(oriday-yuand)+" days.");
						  break;
					    }
					}
					oriday+=23;
				}	
   		 }
   	  }
    }
}