[<EntryPoint>]
let main argv =
    //printfn "Gokigenyou!" 
    let s = System.Console.ReadLine()
    let ans =
        match s with
        | "Sunny" -> "Cloudy"
        | "Cloudy" -> "Rainy"
        | "Rainy" -> "Sunny"
        | _ -> failwith "error."
    System.Console.WriteLine(ans)
    0
