Decades: 20s BC 10s BC 0s BC 0s 10s - 20s - 30s 40s 50s 60s 70s
Years: 20 21 22 23 24 - 25 - 26 27 28 29 30
Births
Deaths
... SASL[?]: (B f g x) = (f (g x)) (C f g x) = (f x g) (S' c f g x) = (c (f x) (g x)) (B* c f g x) = (c (f (g x))) (C' c f g x) = (c (f x) g) Som ...