using System;

namespace _04._Password_Validator
{
    class Program
    {
        static bool PasswordCheckCharacter(string input)
        {
            bool trueOrFalse = true;
            if(!(input.Length>=6 && input.Length<=10))
            {
                Console.WriteLine("Password must be between 6 and 10 characters");
                trueOrFalse = false;
            }
            return trueOrFalse;
        }
        static bool PasswordCheckLettersAndDigits(string input)
        {
            bool trueOrFalse = true;

            for (int i = 0; i < input.Length; i++)
            {
                char currentChar = input[i];
                if (!((currentChar >=48 && currentChar >= 57) || (currentChar >= 65 && currentChar <= 90) || (currentChar >= 97 && currentChar <= 122)))
                {
                    Console.WriteLine("Password must consist only of letters and digits");
                    trueOrFalse = false;

                }

            }

            return trueOrFalse;
        }
        static bool PasswordCheckDigits(string input)
        {
           bool trueOrFalse = false;
            int result;
            int counter = 0;
            for (int i = 0; i < input.Length; i++)
            {
                string character = input[i].ToString();
                if (int.TryParse(character, out result))
                {
                    counter++;
                }
            }
            if(counter<2)
            {
                Console.WriteLine("Password must have at least 2 digits");
                trueOrFalse = true;
            }
            return trueOrFalse;
        }
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            PasswordCheckCharacter(input);
            PasswordCheckDigits(input);
            PasswordCheckLettersAndDigits(input);
            if(!(PasswordCheckCharacter(input) || PasswordCheckDigits(input) || PasswordCheckLettersAndDigits(input)))
            {
                Console.WriteLine("Password is valid");
            }

        }
    }
}