#include <iostream>
#include <string>

int main()
{
	std::string T = "treeone";
	std::string F = "forest";
	std::string S;
	std::cin >> S;
	size_t place = 0;
	size_t tree;
	while (place < S.length())
	{
		tree = S.find(T, place);
		if (tree == -1) { break; }
		S.replace(tree, T.length(), F);
		place = tree + F.length();
	}
	std::cout << S << std::endl;
	return 0;
}