It appears that you simply want to capture all things that can be matched by \w+:

perl -le'$_="xe-2/2/0";print for $_ =~ /(\w+)/g'
[download]

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)