#include<bits/stdc++.h>
using namespace std;
using ll=long long;
#define rep(i,p,n)for(ll i=(ll)p;i<(ll)n;i++)
#define all(x)(x).begin(),(x).end()
#define edt(x1,y1,x2,y2)sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2))

int main() {
    string S;
    cin>>S;
    ll streak=0;
    string ans="",x="";
    rep(i,0,S.size()){
        if(S[i]=="treeone"[streak]){
            //cout<<"maybe"<<endl;
            streak++;
            if(streak>=7){
                ans+="forest";
                x="";
                streak=0;
            }
            else x+=S[i];
        }
        else if(S[i]=='t'){
            ans+=x;
            x+='t';
            streak=1;
        }
        else{
            //cout<<"not"<<endl;
            ans+=x;
            ans+=S[i];
            x="";
            streak=0;
        }
        if(i==S.size()-1)ans+=x;
        //cout<<ans<<" "<<x<<endl;
    }
    cout<<ans<<endl;
    return 0;
}