using System;

public class Program

{

    public static void Main()

    {

        string input = "89148000005339755555";

​

        int sum = 0;

        // We'll use index i = 0 means the right-most digit, i = 1 is second-right, etc

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

        {

            // Get the digit at the i'th position from the right

            int digit = int.Parse(input[input.Length - i - 1].ToString());

​

            // If it's in odd position (starting from the right), then double it.

            if (i % 2 == 1)

            {

                digit *= 2;

​

                // If it's now >= 10, subtract 9

                if (digit >= 10)

                {

                    digit -= 9;

                }

            }

​

            sum += digit;

        }

​

        // It's a pass if the result is a multiple of 10

        bool pass = sum % 10 == 0;

        Console.WriteLine(pass ? "Pass" : "Fail");

    }

}