Problem:
Score : 100 points

Problem Statement

You are given a string S consisting of letters b, d, p and q.
Determine whether S is a mirror string.

Here, a mirror string is a string S such that the following sequence of operations on S results in the same string S:

Reverse the order of the characters in S.

Replace each occurrence of b by d, d by b, p by q, and q by p, simultaneously.

Constraints

1 \leq |S| \leq 10^5

S consists of letters b, d, p, and q.

Input

The input is given from Standard Input in the following format:

S

Output

If S is a mirror string, print Yes. Otherwise, print No.

Sample Input 1

pdbq

Sample Output 1

Yes

Sample Input 2

ppqb

Sample Output 2

No

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

using System;

namespace relay_b
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            bool flag = true;
            for (int i = 0; i < s.Length; i++)
            {
                switch (s[i])
                {
                    case ('b'):
                        {
                            if (s[s.Length - i - 1] != 'd')
                            {
                                flag = false;
                            }
                            break;
                        }
                    case ('d'):
                        {
                            if (s[s.Length - i - 1] != 'b')
                            {
                                flag = false;
                            }
                            break;
                        }
                    case ('p'):
                        {
                            if (s[s.Length - i - 1] != 'q')
                            {
                                flag = false;
                            }
                            break;
                        }
                    case ('q'):
                        {
                            if (s[s.Length - i - 1] != 'p')
                            {
                                flag = false;
                            }
                            break;
                        }
                    default:
                        {
                            flag = false;
                            break;
                        }
                }
            }
            Console.WriteLine(flag ? "Yes" : "No");
        }
    }
}