> #include <stdio.h>
> #include <math.h>
> 
> void main()
> {
> 	int a,b,c,d,x,y,i;
> 	for (i=1;;i++)
> 	{
> 		scanf("%d%d%d%d",&a,&b,&c,&d);
> 		if (a==-1&&b==-1&&c==-1&&d==-1) break;
> 		
> 		else {for (x=1;;x++)---->>>>>>>>>>>>>>>>>>> (x=d+1;;x++)
> 			if (x%23==a%23) break;
> 				for (y=x;;y+=23)
> 					if (y%28==b%28) break;
> 				for (x=y;;x+=644)
> 					if (x%33==c%33) break;
> 				
> 			printf("Case %d: the next triple peak occurs in %d days.\n",i,x-d);
> 	}
> 	
> 	}
> }