#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
#define MOD 1000000007
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3f
#define EPS (1e-10)
using namespace std;
typedef long long ll;
typedef pair<int,int>P;

string l="treeone";
signed main(){
	string s;cin>>s;
	string t;
	string k;
	for(char c:s){
		if(c==l[k.size()]){
			k+=c;
			if(k.size()==l.size()){
				t+="forest";
				k="";
			}
		}
		else{
			t+=k;
			if(c=='t')k="t";
			else t+=c,k="";
		}
	}
	t+=k;
	cout<<t<<endl;
}