using System;

namespace PasswordValidator
{
    class Program
    {
        static void Main(string[] args)
        {

            string text = Console.ReadLine();

            bool firstCheck = Check1(text);
            bool secondCheck = Check2(text);
            bool thirdCheck = Check3(text);

            if (firstCheck == true && secondCheck == true && thirdCheck == true)
            {
                Console.WriteLine("Password is valid");
            }

        }

        static bool Check2(string text)
        {

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

                if (!char.IsLetterOrDigit(text[i]))
                {
                    Console.WriteLine("Password must consist only of letters and digits");
                    return false;
                }

            }

            return true;
        }

        static bool Check3(string text)
        {
            int digitCounter = 0;
            for (int i = 0; i < text.Length; i++)
            {

                if (char.IsDigit(text[i]))
                {
                    digitCounter++;
                }

            }

            if (digitCounter >= 2)
            {
                return true;
            }
            Console.WriteLine("Password must have at least 2 digits");
            return false;
        }

        static bool Check1(string text)
        {
            if (text.Length >= 6 && text.Length <= 10)
            {
                return true;
            }
            Console.WriteLine("Password must be between 6 and 10 characters");
            return false;
        }
    }
}