using System;

public class Program

{

    public static void Main()

    {

        int shift = 5;

        string word;

        word = Console.ReadLine();

        string alph = "abcdefghijklmnopqrstuvwxyz";

        for (int i = 0; i < alph.Length; i++)

            if (alph[i] == word[0])

                Console.WriteLine(i + 1);

​

    }

}