P05.Messages (C# Shell App Paste)

//Disclaimer: The creator of 'C# Shell (C# Offline Compiler)' is in no way responsible for the code posted by any user.
using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;

namespace CSharp_Shell
{

    public static class Program
    {
        public static void Main()
        {
           int input = int.Parse(Console.ReadLine());
           string message = string.Empty;
           for(int i=0;i<input;i++)
           {
            string digits = Console.ReadLine();
            int mainDigit = digits[0]-'0';

            int lenght = digits.Length;
            int offset = (mainDigit-2)*3;
            int index= offset+(lenght-1);
            if(mainDigit==0)
            {
                message +=(char)(index+32);
                continue;
            }

            if(mainDigit == 7 || mainDigit== 9);
            {
                offset++;
            }

            message += (char)(index+97);

           }
           Console.WriteLine(message);



        }

    }
}