using System;
using System.Linq;

class PrintIndex
{
    static void Main()
    {
        char[] letters = new char[26];
        char[] bigLetters = new char[26];
        int up = 0;
        for (char i = 'a'; i <= 'z'; i++)
        {
            letters[up] = i;
            up++;
        }
        up = 0;
        for (char i = 'A'; i <= 'Z'; i++)
        {
            bigLetters[up] = i;
            up++;
        }

        Console.Write("Enter a Word: ");
        string word = Console.ReadLine();
        Console.Write("Indexs of the Letters: ");
        for (int i = 0; i < word.Length; i++)
        {
            for (int l = 0; l < letters.Length; l++)
            {
                if (word[i] == letters[l] || word[i] == bigLetters[l])
                {
                    Console.Write("{0}, ", Array.IndexOf(letters, letters[l])+1);
                }
            }
        }
    }
}