#include<bits/stdc++.h> using namespace std; int main() { int p,e,i,d; cin>>p>>e>>i>>d; for(int t=1;t<924;t++){ for(int q=1;q<=759;q++){ for(int z=1;z<=644;z++){ if((p+t*23==e+q*28)&&p+t*23==i+z*33){ printf("the next triple peak occurs in %d days.",p+t*23-d); } } } } return 0; }