#include <bits/stdc++.h>
using namespace std;
int main(){
    freopen ("horsesnum.in","r",stdin);
    freopen ("horsesnum.out","w",stdout);
    string s,a;
    cin>>s;
    for (int i=0;i<s.length();i++){
        if (('A'<=s[i]&&s[i]<='Z')||('a'<=s[i]&&s[i]<='z')){
            char t=tolower(s[i]);
            a+=t;
        }
    }
    int ans=0;
    for (int i=0;i<a.length();i++){
        if (a.substr(i,5)=="horse"){
            ans++;
            if (a[i+5]=='s')ans++;
        } 
    }
    cout<<ans<<endl;
    return 0;
}