let equal s i t =
  let n = String.length s in
  let m = String.length t in
  i + m <= n && String.sub s i m = t;;

let () =
  let s = read_line () in
  let n = String.length s in
  let ans = Buffer.create 0 in
  let i = ref 0 in
  while !i < n do
    if equal s !i "treeone" then begin
      Buffer.add_string ans "forest";
      i := !i + 7
    end else begin
      Buffer.add_char ans s.[!i];
      incr i
    end
  done;
  print_endline (Buffer.contents ans)