Missing loop code snippet for the last exercise interlocking in Chapter 10.

[alchemistcai]

In the end of the last exercise interlocking in Chapter 10,it says You can use the following loop to find the interlocking words in the word list.

However,the loop code snippet code cell is blank.A work snippet may be like this:

interlocking_words = []

for word in word_list:
    if is_interlocking(word):
        interlocking_words.append(word)
        
interlocking_words

Need to add this snippet;or change the description above,to let readers exercise accumulator themselves.