What does this Ruby snippet output?

1class Card
2  include Comparable
3  RANKS = %w[2 3 4 5 6 7 8 9 10 J Q K A]
4  attr_reader :rank
5  def initialize(r) = @rank = r
6  def <=>(other) = RANKS.index(rank) <=> RANKS.index(other.rank)
7end
8cards = [Card.new("K"), Card.new("2"), Card.new("A"), Card.new("7")]
9puts cards.sort.map(&:rank).inspect
10puts (Card.new("A") > Card.new("K"))