using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string input = "Abc111de2234";

        string output = ""; // Desejado: "Abc1de234";

        char[] numbers = new []{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

        if(!string.IsNullOrWhiteSpace(input))

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

            {

                if (i > 0)

                {

                    if (numbers.Contains(input[i]) && input[i] != input[i-1])

                        output += input[i];

                    else if(!numbers.Contains(input[i]))

                    {

                        output += input[i];

                        continue;

                    }

                }

                else

                    output += input[i];

            }

        Console.WriteLine(output);

    }

}