#include"stdio.h"
#include"math.h"
void main()
{
	int i,k=1,p,e,n,d;
	while(scanf("%d%d%d%d",&p,&e,&i,&d)>0)
	{
	    if(p==-1&&e==-1&&i==-1&&d==-1) break;
	    p=p%23;e=e%28;i=i%33;
	    for(n=d+1;n<=21252;n++)
             {
	        if((n-p)%23==0&&(n-e)%28==0&&(n-i)%33==0)
		{
		    printf("Case %d: the next triple peak occurs in %d days.\n",k++,n-d);
		}
	    }
	}
}