rock_paper_scissors.rb

def game(ar)
  throw1 = ar[0][1].downcase
  throw2 = ar[1][1].downcase
  
  if %w{ rs pr sp }.include?(throw1 + throw2)
    return ar[0]
  elsif %w{ sr rp ps}.include?(throw1 + throw2)
    return ar[1]
  else
    "It's a Tie!"
  end
end

def find_winner(ar)
  if ar[0][0].is_a?(String)
    if ar[1][0].is_a?(String)
      game ar
    else
      find_winner([ar[0]] + [find_winner(ar[1])])
    end
  else
    find_winner([find_winner(ar[0])] + [ar[1]])
  end
end