code: def parse(raw_data)
        raw_data.each_with_object(sell: {}, buy: {}) do |row, result|
          sell_rate = row[11].to_f
          buy_rate  = row[9].to_f
          currency  = row[1][0..2].to_sym
          currency  = :JPY if currency == '100'.to_sym
  
          result[:sell][currency] = sell_rate
          result[:buy][currency]  = buy_rate
        end
      end
docs: Parse the #raw_exchange_rates returned in response
   @param [Array] of the raw_data scraped
   @return [Hash] of exchange rates for selling and buying
     {
       { sell: { SYM: rate }, { SYM: rate }, ... },
       { buy:  { SYM: rate }, { SYM: rate }, ... }
     }