#include<bits/stdc++.h>
#define rep(i, x) for(ll i = 0; i < x; i++)
#define rep2(i, x) for(ll i = 1; i <= x; i++)
#define all(a) (a).begin(),(a).end()
using ll = long long;
using ld = long double;
using namespace std;
signed main() {
    string s, t; cin >> s; ll cnt = -1, n = s.size();
	rep(i, n - 6) {
		if (s[i] == 't' && s[i + 1] == 'r' && s[i + 2] == 'e' && s[i + 3] == 'e' && s[i + 4] == 'o' && s[i + 5] == 'n' && s[i + 6] == 'e') {
			t.push_back('f'); t.push_back('o'); t.push_back('r'); t.push_back('e'); t.push_back('s'); t.push_back('t');
			i += 6;
		}
		else { t.push_back(s[i]); }
		cnt = i;
	}
	for (int h = cnt + 1; h < n; h++) {
		t.push_back(s[h]);
	}
	cout << t << endl;
	return 0;
}