using System;

public class Program

{

    public static void Main()

    {

        var emails = new string[] {"bohdan@ownid.com", "bohdan.donchenko@gmail.com", "bohdan+312@ownid.com", "bohdan+asdasd@ownid.com"};

        foreach (var email in emails) 

        {

            var e = Program.emailCleanup(email);

            Console.WriteLine(e);

        }

    }

    public static string emailCleanup(string email) 

    {

        var emailTrim = email.Trim();

        //Check if email is valid, if not it throws an error

        var addr = new System.Net.Mail.MailAddress(emailTrim);

        var emailSplit = emailTrim.Split('@');

        var name = emailSplit[0].Split('+')[0];

        var domain = emailSplit[1];

        return name + "@" + domain;

    }

}