[mamba-help] grep options

[ASCIA E. <as...@uc...>]

Hi,
I am using mamba with output from GATK ASEReadCounter.  I don't know the
Exon Info. I was trying to run the software, but was having errors due to
the grep command.  If I make the Exon Info "SEVERE_IMPACT=STOP_GAINED" and
use the grep command in the example --grep ">,0,=STOP_GAINED|DFGFDG" it
works.
What grep command should I use for "Unkown"? Or is it ok to leave the exon
information as is? (more sever than it actually might be.) Does it affect
the output?
Best,
Ascia