#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[11501],b[6]={"hello"}; cin>>a; int s1=strlen(a),s=0; for(int i=0;i<s1;i++){ if(a[i]==b[s]){ s++; } } if(s==5){ cout<<"YES"; } else{ cout<<"NO"; } return 0; }