A_Chat_room.cpp

#include <iostream>
#include <string>
using namespace std;

int main() {
    string s;
    cin >> s; 
    string target = "hello"; 
    int j = 0;
    for (int i = 0; i < s.length(); i++) {
        if (j < 5 && s[i] == target[j]) { 
            j++; 
        }
    }

    if (j == 5) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }

    return 0;
}