I have a big text file, each line containing a sentence.
I want to use grep (or something similar in batch) to find sentences where word b occurs exactly or not exactly (some word(s) between them) after word a.
I don't want grep to return a sentence like this:
f g s b d a
because b is not after a but I want to return a sentence like
f g a d m s b f
because b is after a.
It is OK to return sentences where a is both after and before b:
s a s b s a s
I also don't want sentences with only a or b.
I just want the sentences where b is after a (something can be in the middle).
I can easily do it with Python but I want to use the beauty of bash.