Personally I would only touch
NLLL.com
1keyword.com
1 is the big N in prefixes
other than a chemical name like H2O and a few others, a N anywhere but NLLL where N = 1 is a crapshoot
But some elements like H2O are definitely no brainers
Short is sweet, but the N other than NNN or NN or NNNN isn't really that big most of the time