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