下表展示了在一段文本中每个字母出现的次数。 The frequencies that each letter appears in a paragraph is represented as follow. 对于这段文本使用Huffman编码相较使用等长编码能够节约多少比特的空间?Comparing to use codes that have the same length, how many bits of space could be saved when we use Huffman code for the paragraph?