create alias lying_on_back -> on_back
create alias lying_on_side -> on_side
create alias lying_on_stomach -> on_stomach
We're supposed to use lying + on_[X]. Since we can't alias to two things at once, on_[X] is more specific.
And since on_[X] can apparently be used for more than just lying, the on_[X] wiki pages ought to be revised to reflect that...
Updated by jxh2154