The numbers 21, 42, 84, 56, and 28 suggest weeks (3, 6, 12, 8, respectively 4):

I			II			III
Ya	Yb	Sum	Yc	Yd	Sum	Ye	Yf	Sum
6	7	13	10	8	18	4	4	8
8	8	16	6	-	6	6	4	10
7	6	13	16	8	24	10	8	18
21	21	42	42 + 24 + 18 = 84

	55		19	8
Ya1-3 (1)		Yc3-7 (57)
56 = 8 * 7		28 = 4 * 7
84 = 12 * 7

8 'weeks' for 56 glyphs from hahe in Ya1-3 implies the possibility of 1 glyph representing 5 days (because 56 * 5 = 280). And 4 'weeks' will then be 140 days.

A division of 84 into 3 segments of time leads to:

	27		27		27
Ya1-3 (1)		Yb2-3 (29)		Yc3-7 (57)
28		28		28
84 = 3 * 28

Where does this pattern place the two vaha kai glyphs? They apparently subdivide the flow of glyphs into 36 + 42 + 6:

	27		6		20		20		6
Ya1-3 (1)		Yb2-3 (29)		Yc1-3 (36)		Yc3-7 (57)		Yb3-2 (78)
36					42

84 = 14 * 6 and 5 * 78 = 390.