398				84
Aa3-8	Aa3-9 (184)	Aa3-10		Aa7-84 (584)	Aa7-85	Aa8-1
		400

Obviously the pair Aa7-85 and Aa8-1 serve a function of knitting together the end of line Aa7 with the beginning of line Aa8. And manu kake in Aa3-10 fills a function of standing at the beginning of a new 'season'.

5 * 80 = 400 seems to be an approximation only, and it may be significant that 403 = 363 + 40:

Gb6-17 (400)	Gb6-18	Gb6-19	Gb6-20 (403)

Relying on the manu kake sign we can conclude hahe in Aa3-9 has the last position in a period. This period could have 184 days, it could have 64 + 184 = 248 days, or it could be of some other length. There is uncertainty because the text does not seem to begin with Aa1-1.