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