#include<cstring> #include<iostream> using namespace std; int main() { char a[11501],b[11501]={'h','e','l','l','o'}; cin >> a; int n=0; for (int i = 0; a[i] != '\0'; i++) { if (a[i] == b[n]) { n++; } } if(n == 5){ cout<<"YES"; }else{ cout<<"NO"; } }