#include<iostream> #include<cstring> using namespace std; int main() { char a[1500]; char b[100] = {'h','e','l','l','o'}; cin>>a; int count = 0; for(int i=0;i<strlen(a);i++){ if(a[i] == b[count]){ count++; } } if(count == 5){ cout<<"YES"; }else{ cout<<"NO"; } return 0; }