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 C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
class Program
{
	static void Main(string[] args)
	{
      	string anser = "Yes";
		// 整数の入力
		string S = Console.ReadLine();
      	char[] a ={'R','U','D'};
      	char[] b ={'L','U','D'};
      	for(int i = 0;i< S.Length;i++){
        	if ( i % 2 == 0){
				
            	if (Array.IndexOf(a, S[i]) < 0){
                	anser = "No";
                  	break;
                }
            }else{
              if (Array.IndexOf(b, S[i]) < 0){
                	anser = "No";
                  	break;
                }
            }
        }
      	Console.WriteLine(anser);

	}
}