line	glyphs	line	glyphs
a1	90	b1	82
a2	85	b2	85
a3	76	b3	77
a4	82	b4	80
a5	83	b5	80
a6	84	b6	92
a7	85	b7	84
a8	85	b8	84
sum	670	sum	664
red numbers	504	red numbers	504
difference	166	difference	160

504 = 6 * 84 = 12 * 42 = 24 * 21 = 18 * 28, presumably a combination of 18(0) for the summer half year (when sun is 'present') and 28 for the number of nights in the month when sun light is seen reflected on the moon.