How to solve the horn divination

How does horn divination solve the problem of yin and yang operation? Master tells you,

Horn divination; Divided into: ① holy divination, ② yang divination, ③ yin divination,

L, sacred, with one horn face up and one face down, that is, the back face up, is sacred.

2. Cucumber, with both corners facing up, is Cucumber. ：

3, Yin Yi, two sides of the back up for Yin Yi.