#include <bits/stdc++.h>
using namespace std;
string a;
char c;
long long len;
long long ans;
int main(){
	freopen("horsesnum.in","r",stdin);
	freopen("horsesnum.out","w",stdout);
	while(scanf("%c",&c) != EOF){
		if((c>='a'&&c<='z') || (c>='A'&&c<='Z')){
			a += c;
		}
	}
	len = a.length();
	if(len < 5){
		printf("0");
		return 0;
	}
	for(long long i=0;i<len-5;++i){//检查 
		if((a[i]=='h' || a[i]=='H') && (a[i+1]=='o'||a[i+1]=='O') && (a[i+2]=='r'||a[i+2]=='R') && (a[i+3]=='s'||a[i+3]=='S') && (a[i+4]=='e'||a[i+4]=='E') && (a[i+5]=='s'||a[i+5]=='S')){
			ans+=2;
		}
	}
	for(long long i=0;i<len-5;++i){
		if((a[i]=='h' || a[i]=='H') && (a[i+1]=='o'||a[i+1]=='O') && (a[i+2]=='r'||a[i+2]=='R') && (a[i+3]=='s'||a[i+3]=='S') && (a[i+4]=='e'||a[i+4]=='E') && a[i+5]!='s'&&a[i+5]!='S'){
			++ans;
		}
	}
	if((a[len-5]=='h' || a[len-5]=='H') && (a[len-4]=='o'||a[len-4]=='O') && (a[len-3]=='r'||a[len-3]=='R') && (a[len-2]=='s'||a[len-2]=='S') && (a[len-1]=='e'||a[len-1]=='E')){
		++ans;
	}
	printf("%lld",ans);
	return 0;
}