There was a slight error in the snakes theory.pdf file. The list of hash codes in figure four was incomplete. It showed up as
which was text that was left over from drafting the assignment. The real list of hash codes you should use is<9, 10, 10>
<17, 12, 128, 10, 7, 14, 129, 132, 127, 96, 42>
The theory.pdf and theory.zip files linked on the lecture page and from FrontDesk now reflect this.
Sorry for the confusion!