Problem:
Score: 100 points

Problem Statement

The weather in Takahashi's town changes day by day, in the following cycle: Sunny, Cloudy, Rainy, Sunny, Cloudy, Rainy, ...

Given is a string S representing the weather in the town today. Predict the weather tomorrow.

Constraints

S is Sunny, Cloudy, or Rainy.

Input

Input is given from Standard Input in the following format:

S

Output

Print a string representing the expected weather tomorrow, in the same format in which input is given.

Sample Input 1

Sunny

Sample Output 1

Cloudy

In Takahashi's town, a sunny day is followed by a cloudy day.

Sample Input 2

Rainy

Sample Output 2

Sunny

Solution in PHP7 (7.0.15) (judge verdict: Wrong Answer)

<?php
declare(strict_types=1);

//引数を取得
list($s) = fscanf(STDIN, '%s');

//天気を設定
$weatherArray = ['Sunny', 'Cloudy', 'Rainy']; 

//現在の天気から明日の天気のインデックスを取得
$weatherIndex = array_search($s, $weatherArray) + 1;

//天気のインデックスがなければ0に設定
if (array_key_exists($weatherIndex, $weatherArray)) {
    $weatherIndex = 0;
}

//明日の天気を出力
echo $weatherArray[$weatherIndex];