#include<bits/stdc++.h> using namespace std; int main(){ int p,e,i,d; cin >>p>>e>>i>>d; for(int j=d;j<=21252;j++){ if((j-p)%23==0&&(j-e)%28==0&&(j-i)%33==0){ cout <<"the next triple peak occurs in "<<j-d <<" days."; } } return 0; }