Hi Perl_usr. That is not a typo, it is a feature. And this is not the first time this someone else noticed this. See 'stumbit' - intentional or not? for more info.

jeffa

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)