Domain LL & LLL and 1 word Domain

hello all..

i want to ask ;

1. is it worth LL(2 letters) domain with this extension? :
xyz
us
biz
cc
de
uk.
co.uk
in
.co.in

2. is it worth LLL (3 letters) domain with this extension? :
xyz
us
biz
cc
de
uk.
co.uk
in
.co.in

3.and is it worth 1 word domain with this extension ?
xyz
us
biz
cc
de
uk.
co.uk
in
co.in

4. wich one is better to keep of these domains? (except .biz)

5. wich one is worse to keep of these domains?

thank you so much...
sorry i'm new in domainer