How can i extract last shortest string using regex in java

Question

how can i extract bold range string in below

string :

1. hello world blah -d blah vlaah -n blah vlahh
2. hello world blah -n blah vlahh -d blah vlaah
3. hello world blah -d blaaah

I tried. -[dn] .*$ but it found longest match string like below

1. hello world blah -d blah vlaah -n blah vlahh

I want to extract shortest match string . thanks in advance

Answer 1

You can use a negative lookahead to avoid matching another -d/-n in the match:

-[dn] (?!.*?-[dn]).*$

RegEx Demo

Answer 2

Could throw a greedy .* before to eat up:

^.*(-[dn] .*)$

And grab matches of the first capture group . See test at regex101