Incorrect singlurization with special cases 'wolves', 'calves', and 'shelves'.

[jimmiebfulton]

Inflector singularizes these special cases as:

wolves => wof
calves => caf
shelves => shef

The equivalent pluralizations work correctly.

wolf => wolves
calf => calves
shelf => shelves

It would be easy to add these to the exceptions list, but I'm wondering if there is a smarter way to handle these?

https://www.thefreedictionary.com/words-that-end-in-lves