Longest Words

Create a markdown cell with a level $2$ header that reads "Longest Words". Add unformatted text explaining that you will display the longest several words found in the novel.

If done correctly, the results from the previous code cell should have stated that the novel contains $1$ word with $17$ characters, $4$ words with $16$ characters, and $17$ words with $15$ characters. We will now display these $21$ words.

To accomplish this task, we will use the option key parameter of the sorted $()$ function. Arguments for the key parameter should be functions that accept elements of the list being sorted. The list will be sorted according to the values returned by the function when it is applied to each element. For example, the expression shown below will sort the elements of the list unique in decreasing order according to their length.

sorted$($unique$,$ key$=$len, reverse$=$True$)$

Use the expression above to sort the words in unique according to their length. Then use a loop to print the first $21$ elements of the resulting list, with one word per line.