#include<bits/stdc++.h>
using namespace std;
string s;
int at,num;
char m[6]={'h','o','r','s','e','s'};
int main()
{
    freopen("horsesnum.in","r",stdin);
    freopen("horsesnum.out","r",stdout);
    getline(cin,s);
    for(int i=0;i<s.size();i++)
    {
        s[i]=tolower(s[i]);
        if(s[i]>='a' && s[i]<='z')
        {
            //cout<<s[i]<<" "<<num<<endl;
            if(s[i]==m[at]) 
            {
                at++;
                if(at>=5) num++;
                if(at==6) at=0;
            }
            else at=0;
        }
    }
    cout<<num;
}