#include <iostream> #include<cstring> using namespace std; //字符串 char a[10000];//'\0',C风格的字符串 char b[10000];//'\0',C风格的字符串 int main() { cin>>a;//hello int b = 0; for (int i = 0;a[i] != '\0';i++) { if (a[i] == 'h' && b == 0) { b++; } if (a[i] == 'e' && b == 1) { b++; } if (a[i] == 'l' && b == 2) { b++; } if (a[i] == 'l' && b == 3) { b++; } if (a[i] == 'o'&& b == 4) { b++; } } if (b == 5) { cout<<"YES"; }else { cout<<"NO"; } return 0; }