using System;
using System.Diagnostics;
using System.Collections.Generic;
 
 
public class Tarjeta {
	public /*required*/ int Num {
		get => this._num;
		init {
			Debug.Assert( value > 0, "num. de tarjeta debe ser positivo" );
			this._num = value;
			this.calculaCVC();
		}
	}
 
	public /*required*/ DateOnly Caduca {
		get => this._caduca;
		init {
			Debug.Assert( value > DateOnly.FromDateTime( DateTime.Now ), "caducidad debe ser a futuro" );
			this._caduca = value;
		}
	}
 
	public int CVC { get; private set; }
 
	public Tarjeta(int num, DateOnly caduca)
	{
		Debug.Assert( num > 0, "num. de tarjeta debe ser positivo" );
		Debug.Assert( caduca > DateOnly.FromDateTime( DateTime.Now ), "caducidad debe ser a futuro" );
 
		this.Num = num;
		this.Caduca = caduca;
		this.calculaCVC();
	}
 
	private void calculaCVC()
	{
		this.CVC = this.Num % 1000;
	}
 
	public override string ToString()
	{
		return $"{this.Num} ({this.Caduca}, {this.CVC})";
	}
 
	private int _num;
	private DateOnly _caduca;
}
 
 
public class Test
{
	public static void Main()
	{
	/*
		var t1 = new Tarjeta {
			Num = 548901687,
			Caduca = new DateOnly( 2034, 11, 5 )
		};
	*/	
		var t2 = new Tarjeta( 548901687, new DateOnly( 2034, 11, 5 ) );
 
		// Console.WriteLine( t1 );
		Console.WriteLine( t2 );
	}
}
 

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

import time

from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Firefox()

driver.get("https://d...content-available-to-author-only...a.com/automation-practice-form")
driver.maximize_window()

firstName = driver.find_element(By.CSS_SELECTOR, "input#firstName.mr-sm-2.form-control")

firstName.send_keys("Yaswanth")

lastName = driver.find_element(By.CSS_SELECTOR,"input#lastName.mr-sm-2.form-control")

lastName.send_keys("Gudivada")

time.sleep(5)

driver.close()