References: Section 5.2 in Algorithms, 4th edition
1.
Draw the R-way trie when you insert the following key-value pairs into
an initially empty trie. Use the alphabet of ten digits (R = 10).
Draw all of the null links.
351-A 652-B 893-C 353-D 352-E 622-F 3522-G 355-H
2.
Draw the TST that results when you insert the following keys into
an initially empty trie (in the order given).
Draw all of the null links.
351-A 652-B 893-C 353-D 352-E 622-F 3522-G 355-H