using System;

using System.Text;

using System.Text.RegularExpressions;

​

namespace FromGibberishUgly {

  class Program {

    //TODO: or replace it with loop solution

    //private static string GibberishToRomanian(string text) =>

    //  Regex.Replace(text ?? "", @"([aeiou])p\1", "$1", RegexOptions.IgnoreCase);

    private static string GibberishToRomanian(string text) {

      if (null == text)

        return "";

​

      const string vowels = "aeiouAEIOU";

​

      StringBuilder sb = new StringBuilder(text.Length);

​

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

        sb.Append(text[i]);

​

         // when facing vowel + p + vowel we jump over p + vowel 

        if (i < text.Length - 2 &&

            vowels.Contains(text[i]) &&

            text[i + 1] == 'p' &&

            char.ToLower(text[i + 2]) == char.ToLower(text[i]))

          i += 2;

      }

​

      return sb.ToString();

    }  

​

    static void Main(string[] args) {

      // Uncomment, if you want user input       

      // Console.WriteLine(Console.ReadLine()); 

      // Demo:      

      Console.WriteLine(GibberishToRomanian("Apanapa aparepe meperepe"));

    }

  }

}