A zookeeper measured the lengths of different animals at the zoo. \begin{tabular}{|l|l|}
\hline
Animal & Length \\
\hline
Snake & 23 \text{ inches} \\
Lion & 60 \text{ inches} \\
Alligator & 55 \text{ inches} \\
Otter & 39 \text{ inches} \\
\hline
\end{tabular} How long are the otter and alligator combined? inches