RPS Winner

rps.rb

def game(pair)
  raise WrongNumberOfPlayersError unless pair.length == 2
  
  strategy = pair[0][1].downcase + pair[1][1].downcase
  if ["rs", "sp", "pr"].include?(strategy)
    #return "#{pair[0]} wins since #{pair[0][1]} > #{pair[1][1]}}"
    return pair[0]
  elsif ["sr", "ps", "rp"].include?(strategy)
    #return "#{pair[1]} wins since #{pair[1][1]} > #{pair[0][1]}}"
    return pair[1]
  elsif ["rr", "ss", "pp"].include?(strategy)
    #return "It's a tie since #{pair[0][1]} = #{pair[1][1]}"
    return "It's a Tie!"
  else
      raise NoSuchStrategyError
  end
end

def find_winner(bracket)
  if bracket.first.first.is_a?(String)
    game([bracket.first, bracket.last])
  else
    game([find_winner(bracket.first), find_winner(bracket.last)])
  end
end