YS4 glyphs from: Maya Hieroglyphic Database: Catalog. Drawings by Matthew Looper, except codical examples by Martha Macri.

YS4 #1 TZ'AK count; add

YS4 #2 TZ'AK count; add

YS4 #3 TZ'AK count; add

YS4 #4 TZ'AK count; add