using System;

public class Program

{

    public static void Main()

    {

        string[] letters = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","1","2","3","4","5","6","7","8","9","0","~","`","!","@","#","$","%","^","&","*","(",")","-","_","=","+","[","]","{","}",":",";","<",",",">",".","?","/",};

        Random random = new Random();

        int randomcharacter1 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter1]);

        int randomcharacter2 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter2]);

        int randomcharacter3 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter3]);

        int randomcharacter4 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter4]);

        int randomcharacter5 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter5]);

        int randomcharacter6 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter6]);

        int randomcharacter7 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter7]);

        int randomcharacter8 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter8]);

        int randomcharacter9 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter9]);

        int randomcharacter10 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter10]);

        int randomcharacter11 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter11]);

        int randomcharacter12 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter12]);

        int randomcharacter13 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter13]);

        int randomcharacter14 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter14]);

        int randomcharacter15 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter15]);

        int randomcharacter16 = random.Next(0, letters.Length);

        Console.Write(letters[randomcharacter16]);

    }

}