Messages

using System;
namespace messages
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            int numberOfLines = int.Parse(Console.ReadLine());
            string sumCurrentChar = " ";

            for (int i = 1; i <= numberOfLines; i++)
            {
                string input = Console.ReadLine();
                char[] inputCountArr = new char[input.Length]; // checker how many times the user is input same number
                char currentChar = '0';


                if (input.Contains("2"))
                {
                    char[] content = new char[] { 'a', 'b', 'c' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);

                }

                else if (input.Contains("3"))
                {

                    char[] content = new char[] { 'D', 'e', 'f' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);
                }

                else if (input.Contains("4"))
                {

                    char[] content = new char[] { 'g', 'h', 'i' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);
                }

                else if (input.Contains("5"))
                {

                    char[] content = new char[] { 'j', 'k', 'l' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);
                }
                else if (input.Contains("6"))
                {

                    char[] content = new char[] { 'M', 'n', 'o' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);
                }

                else if (input.Contains("7"))
                {

                    char[] content = new char[] { 'p', 'q', 'r', 's' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);
                }

                else if (input.Contains("8"))
                {

                    char[] content = new char[] { 't', 'u', 'v' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);
                }

                else if (input.Contains("9"))
                {

                    char[] content = new char[] { 'W', 'x', 'y', 'z' };
                    currentChar = CalculateCurrentChar(inputCountArr, currentChar, content);
                }

                else if (input.Contains("0"))
                {
                    currentChar = ' ';

                }

                sumCurrentChar = sumCurrentChar+currentChar;
            }


            Console.WriteLine(sumCurrentChar.ToLower());

        }

        private static char CalculateCurrentChar(char[] inputCountArr, char currentChar, char[] content)
        {

            if (inputCountArr.Length == 1)
            {
                currentChar = content[0];
            }

            else if (inputCountArr.Length == 2)
            {
                currentChar = content[1];
            }

            else if (inputCountArr.Length == 3)
            {
                currentChar = content[2];
            }

            else if (inputCountArr.Length == 4 && content.Length==4)
            {
                currentChar = content[3];
            }

            else if (inputCountArr.Length >= content.Length)
            {
                currentChar = content[inputCountArr.Length % content.Length];
            }



            return currentChar;
        }
    }
}