Can someone please factorize these 2 classes with an abstract class ? And changing them accordingly?

Question

https://code.sololearn.com/cX7NtT6i2a6z/?ref=app

Answer 1

I just wanted to see if someone would have done the same than me, see, what do you think?

https://code.sololearn.com/cVwDNgPIdMxf/?ref=app

Answer 2

Okay thanks.
The toString methid is to overriden in both concrete classes or in the abstract class ?