The 1st period is divided in two parts and with Ga3-1 a 24-glyph long 'story' begins.
Ga2-27 Ga2-28 Ga2-29
Ga3-1 Ga3-2 Ga3-3 Ga3-4 Ga3-5
In Ga3-10 we can observe the close connection between vero and ragi. Cfr the parallel Ka4-4:

Ga3-6 Ga3-7 Ga3-8 Ga3-9
Ga3-10 Ga3-11 Ga3-12 Ga3-13 Ga3-14 Ga3-15 Ga3-16
Ga3-17 Ga3-18 Ga3-19 Ga3-20 Ga3-21

Adding the 3 glyphs from Rei (Ga2-27--29) we reach 27 glyphs and 27 = 3 * 3 * 3.

Ga3-22 Ga3-23 Ga3-24