Recently I came across following sentence on a form at a client's intranet:
Enter the domain name(s) of the external party(s) you want to share with.
Except for the fact that the sentence doesn't sound 100% correct in my head when I read it, the part that disturbed me most was
In the case of name(s) it's correct as the plural of name is names. But the plural of party is parties and not partys.
My question is: how can you combine the singular and plural of the word party in one 'word'. Or is there another short form to do this?