// #region
enum Input {
  static func int() -> Int {
    Int(readLine()!)!
  }
}

extension Bool {
  func print<T>(yes: T, no: T) {
    Swift.print(self ? yes : no)
  }
}
// #endregion

let n = Input.int()
(n < 1200).print(yes: "green", no: "difficult")