open System

[<EntryPoint>]
let main _ =
(*
  I'm always watching you...
 _________
/ ___ ___ \
| <●> <●> |
\    |   /
 |  MMM  |
 \  WWW  /
  \_____/
*)
  let s = System.Console.ReadLine()
  let ans =
    match s with
    | "Sunny"  -> "Cloudy"
    | "Cloudy" -> "Rainy"
    | "Rainy"  -> "Sunny"
    | _        -> failwith "error."
  System.Console.WriteLine(ans)
  0