# include<iostream> # include<cstring> # include<cstdio> using namespace std; int main(){ /*char str1[51],str2[51]; cin >> str1 >> str2; int l=strlen(str1); for (int i=0;i<l;i++) { if(str1[i]==str2[i]){ cout<<1; }else{ cout<<0; } } */ char n[1501]; int m[5] = {'h','e','l','l','o'}; int x = 0; cin >> n; for(int i = 0;n[i] != '\0';i++){ if(n[i] == m[x]) x++; } if(x == 5) cout << "YES"; else cout << "NO"; return 0; }