#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ll long long 
#define P pair<int,int>
#define LP pair<ll,ll>
using namespace std;
int main() {
	string s;
	cin >> s;
	if (s.length() > 6) {
		for (int i = 0; i < s.length() - 6; i++) {
			if (s[i] == 't' and s[i + 1] == 'r' and s[i + 2] == 'e'
				and s[i + 3] == 'e' and s[i + 4] == 'o' and s[i + 5] == 'n'
				and s[i + 6] == 'e') {
				s[i] = 'f';
				s[i + 1] = 'o';
				s[i + 2] = 'r';
				s[i + 3] = 'e';
				s[i + 4] = 's';
				s[i + 5] = 't';
				s[i + 6] = NULL;
				i += 6;
			}
		}
	}
	cout << s << endl;
	return 0;
}