using System;

public class Program

{

    static string chars = "qwertyuiop0123asdfghjkl654zxcvbnm987";

    public static void Main()

    {

        Console.WriteLine(CreateSerial());

    }

    public static string CreateSerial()

    {

        string s = "";

        Random rng = new Random();

        for(int i = 0; i <= 9; i++)

        {

            int index = rng.Next(chars.Length);

            char c = chars[index];

            s += c;

        }

        return s;

    }

}