#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[1500],b[6]={"hello"}; int s=0; cin>>a; for(int i=0;a[i]!='\0';i++){ if(a[i]==b[x]) x+=1; if(x==5) cout<<"YES"; else cout<<"NO"; } return 0; }