Things are complicated, though, because unmarked manu rere glyphs appear already in line Ha7:

Ha2-2	Ha2-52	Ha4-46	Ha7-126	Ha8-107	Ha8-109	Ha8-110	Ha9-111
long feet		short feet	unmarked
Ha11-103	Ha12-11	Hb1-221	Hb2-1	Hb2-3	Hb2-12	Hb4-4	Hb5-7
unmarked
Hb8-116	Hb8-139	Hb9-20	Hb9-47	Hb9-58	Hb10-12	Hb12-36
unmarked	long feet	unmarked

19 out of 23 manu rere are unmarked (blue above), and Ha12-11 is the 7th of them. 12 arrive beyond manu rere in Ha12-11.

Maybe the 'spirit of Sun' leaves him in line Ha7, which is in order because the 7th day in the week is black. Manu rere in Ha12-11 is then repeating the message - number 7 is without light.

19 is a number beyond the 18 periods of Sun (if we count 18 * 20 = 360). It should therefore be understood as 7 + 12.

12 manu rere glyphs beyond Ha12-11 (a Saturday) possibly has to do with the 'underworld' travel of Sun from his descent in the west to his arrival at the horizon in the east where he will be reborn.