main()
{long p,e,m,d,i,res,j=1;
 while(scanf("%ld%ld%ld%ld",&p,&e,&m,&d))
    {if(p==-1||e==-1||m==-1||d==-1)break;
     for(i=0;i<=644;i++)
       {res=33*i+m;
	if(!((res-p)%23)&&!((res-e)%28)&&res>d) break;}
     if(res-d>21252)res=res-21252;
     printf("Case %ld: the next triple peak occurs in %ld days.\n",j++,res-d);}
}