<p>是否有比以下算法更有效的算法来查找给定语言的所有子字符串:</p>
<pre><code>import string.ascii_lowercase as alphabet
languge = {'aa', 'bc', 'wxyz', 'uz'};
for i in xrange(len(alphabet)):
for j in xrange(i,len(alphabet)):
substirng = alphabet[i:j+1]
if substirng in languge:
print substirng
</code></pre>