Twelve days' work, what are the twelve branches?

Heavenly stems are: A, B, C, D, E, Self, G, Xin, Man and Ghost. The twelve earthly branches are: Zi (mouse) Ugly (ox) Yin (tiger) Mao (rabbit) Chen (dragon) Si (snake) Wu (horse) Wei (sheep) Shen (monkey) You (chicken) Garrison (dog) Sea (pig). The heavenly stems and twelve earthly branches are circularly matched into sixty jiazi.