How to define www.*.abc.example.com wildcard domain in nginx server block?

Question

I want to define my own domain something like this - www..abc.example.com in nginx server blocks . i have tried to do like this - www(.).abc.example.com * & it throws error like - nginx: [emerg] invalid server name or wildcard "www(.*).abc.example.com" on 0.0.0.0:443