New comment by leahneukirchen on mblaze repository

https://github.com/leahneukirchen/mblaze/pull/223#issuecomment-1075488709

Comment:
I don't think this will work, as we had the explicit cases exactly for 6 lines by default, you'd need to generalize the algorithm.

Also note that in POSIX sh you can use `$((math))` instead of `$(expr math)`.