Consecutive Cards

from random import shuffle

values = ['A', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K']
cards = 4 * values  # create 52 cards (only the 52 values are required; suits are irrelevant and not needed)
trials = 5_000_000
desired_outcome = 0

for _ in range (trials):
    shuffle(cards)  # shuffle the cards using random.shuffle()
    for i in range (51):
        if cards[i] == cards[i+1]:
            desired_outcome += 1
            break

print(f'Desired Outcome = {desired_outcome :,} times = {desired_outcome*100/trials :.2f}%')