#include <iostream>
#include <string>

using namespace std;

int main() {
    string s;
    const string from = "treeone";
    const string to = "forest";
    cin >> s;
    unsigned int pos = s.find(from);
    if (pos == string::npos) {
        cout << s << endl;
    } else {
        cout << s.replace(pos, from.length(), to);
    }
    return 0;
}