Problem:
Score : 200 points

Problem Statement

You are given string S and T consisting of lowercase English letters.

Determine if S equals T after rotation.

That is, determine if S equals T after the following operation is performed some number of times:

Operation: Let S = S_1 S_2 ... S_{|S|}. Change S to S_{|S|} S_1 S_2 ... S_{|S|-1}.

Here, |X| denotes the length of the string X.

Constraints

2 \leq |S| \leq 100

|S| = |T|

S and T consist of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S
T

Output

If S equals T after rotation, print Yes; if it does not, print No.

Sample Input 1

kyoto
tokyo

Sample Output 1

Yes

In the first operation, kyoto becomes okyot.

In the second operation, okyot becomes tokyo.

Sample Input 2

abc
arc

Sample Output 2

No

abc does not equal arc after any number of operations.

Sample Input 3

aaaaaaaaaaaaaaab
aaaaaaaaaaaaaaab

Sample Output 3

Yes

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

namespace AtCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            //[summary]B - String Rotation
            string s = Console.ReadLine();
            string t = Console.ReadLine();
            
            if(IsMatchString(s, t))
            {
                Console.WriteLine("Yes");    
            }
            else
            {
                Console.WriteLine("No");    
            }
        }
        
        static bool IsMatchString(string s, string t)
        {
            string rotate = s;

            while (true)
            {
                if(rotate == t)
                {
                    return true;    
                }
                else
                {
                    rotate = RotateString(rotate);    
                }
                
                if(rotate == s)
                {
                    return false;    
                }
            }
        }

        static string RotateString(string s)
        {
            var array = s.ToCharArray();
            char lastChar = s.Last();
            var substring = String.Join("", array.Take(s.Length - 1));
            return lastChar + substring;
        }
    }
}