#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
#include <iomanip>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 
#define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) 

int main()
{

  CIN( string , S );
  uint size = S.size();
  ll state = -1;
  // treeone
  // 0123456
  
  for( ll i = 0 ; i < size ; i++ ){

    const string c = S.substr( i , 1 );

    if( c == "t" ){

      state = 0;

    } else if( c == "r" ){

      if( state == 0 ){

	state++;

      } else {

	state = -1;

      }

    } else if( c == "e" ){

      if( state == 1 || state == 2 ){

	state++;

      } else if( state == 5 ){

	S = S.substr( 0 , i - 6 ) + "forest" + S.substr( i + 1 );
	size = S.size();
	i--;
	// 二度目の置換は不要なのでディクリメントは１回
	// i--;
	state = -1;

      } else {

	state = -1;

      }

    } else if( c == "o" ){

      if( state == 3 ){

	state++;

      } else {

	state = -1;

      }

    } else if( c == "n" ){

      if( state == 4 ){

	state++;

      } else {

	state = -1;

      }

    } else {

      state = -1;

    }
    
  }
  
  cout << S << endl;
  return 0;

}