#include <bits/stdc++.h>
using namespace std;

#define int long long

signed main(){
	string s;
	cin >> s;
	int n = s.size();
	s +="USHITAPUNICHIAKUN";

	int zone;
	int ans = 0;
	int e = 0;
	for(int i = 0;i < n;i++){
		if(s[i] == 'p' && s[i+1] == 'h' && s[i+2] == 'n'){
			zone = 0;
			for(int j = i+3;j < n;j += 2){
				if(s[j] == 'o' && s[j+1] == 'm'){
					zone++;
				}
			}
			ans = max(ans, zone*2+1);
		}
		
		if(s[i] == 'e' && s[i] == 'h') ans = max(ans, 1ll);

		if(s[i] == 'p' && s[i+1] == 'e' && s[i+2] == 'n' && s[i+3] == 'h'){
			zone = 0;
			for(int j = i+4;j < n;j += 2){
				if(s[j] == 'o' && s[j+1] == 'm'){
					zone++;
				}
			}
			ans = max(ans, zone*2+2);
		}
	}

	cout << ans << endl;

	return 0;
}