using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        ValidateEmailAccount accountDetails = new ValidateEmailAccount();

        bool validationStatus = accountDetails.VerifyEmailAccount("saravananashokan1@gmail.com","abcdeF1!");

        Console.WriteLine(validationStatus.ToString());

    }

}

public class ValidateEmailAccount

{

    public bool VerifyEmailAccount(string eMail, string password)

    {

        if(this.ValidateMail(eMail) && this.ValidatePassword(password))

            return true;

        else

            return false;

    }

    public bool ValidateMail(string mailAddress)

    {

        bool containsAtSign = mailAddress.Contains("@") && (this.GetAtCount(mailAddress) == 1);

        bool vaildDomain = false;

        if(containsAtSign)

        vaildDomain = this.ValidateDomain(mailAddress.Split('@'));

        return (containsAtSign && vaildDomain) ? true : false;

    }

    public int GetAtCount(string mailAddress)

    {

        int count = 0;

        foreach(var character in mailAddress)

        {

            if(character == '@')

                count++;

        }   

        return count;

    }

    public bool ValidateDomain(string[] splitMailAddress)

    {

        if(splitMailAddress[1].Equals("gmail.com") || splitMailAddress[1].Equals("yahoo.com"))

            return true;

        else

            return false;

    }

    public bool ValidatePassword(string password)

    {

        var Password1 =password;

        int count = 0; 

        var hasLowerChar = new Regex(@"[a-z]+");

        var hasUpperChar = new Regex(@"[A-Z]+");

        var hasNumber = new Regex(@"[0-9]+");

        var hasSymbols = new Regex(@"[!@#$%^&*()_+=\[{\]};:<>|./?,-]");

        foreach (char c in Password1)  //counts number of lowercase letters

        {

                    if(Char.IsLower(c))

                    count++;

        }   

        if(Password1.Length < 8  )

        {

            return false;

        }

        else if(Password1.Length > 8)

        {

            return false;

        }

        else if(count<5)

        {

            return false;

        }

        else if(count>5)

        {

            return false;

        }

        else if (!hasLowerChar.IsMatch(Password1))

        {

            return false;

        }

        else if (!hasUpperChar.IsMatch(Password1))

        {

            return false;

        }

        else if (!hasNumber.IsMatch(Password1))

        {

            return false;

        }

        else if (!hasSymbols.IsMatch(Password1))

        {

            return false;

        }

        else 

        {

            return true;

        }

    }   

}