deck

def shuffle_deck(deck)
	deck.each_with_index do |card, index|
		deck[index] = deck[Random.rand(51)]
	end
	deck
end

suits = ['S', 'H', 'D', 'C']
numbers = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A']
deck = []

suits.each do |suit|
  numbers.each do |number|
  	deck << "#{suit}#{number}"
  end
 end

shuffle_deck deck
puts deck.join(", ")
puts "Shuffled #{deck.count} cards."