# include<cstring> //字符串头文件 # include<iostream> using namespace std; int main(){ char a[1500]; cin>>a; int c=0; char b[]={'h','e','l','l','o'}; int am=strlen(a); for(int i=0;i<am;i++){ if(a[i]==b[c]){ c++; } } if(c==5){ cout<<"YES"; } else{ cout<<"NO"; } return 0; }