side b with 664 glyphs = 332 days
260					400
	Ab4-17	Ab4-18	Ab4-19	Ab4-20
130	days 131-132				200

I have black-marked niu at Ab4-17 (where 4 * 17 = 68) because its ordinal number is 261 = 9 * 29. My 'map' is ordered with 260 glyphs (130 days) as one group before the arrival of the ominous 261. Ab4-17 stands where a viri could be expected, but no such glyph is close in the text.

400 glyphs at right (200 days) gives a nice picture. Side b has 13 * 10 days at left and 20 * 10 days at right. However, moe in Ab4-18 should presumbaly be interpreted to mean that next season begins with Ab4-19. If so, then 201 days could have been intended. 201 = 3 * 67, and if we remember 68 at Ab4-17 a number play could be 68 + 67 = 136 - i.e. the first (1) 'year' (36).