- <b>B</b> -+ +--- <b>C</b> --+ +---- <b>D</b> -----+ +-- <b>E</b> --
| | | | | |
F: ------> G: ------> K: ------>
- | | | | | η | | | ψ
+ | | | | | η | | | ψ
| | | | v | | v
| | H: ------> L: ------>
- | | | | | φ | |
+ | | | | | φ | |
| | | | v | |
| | J: ------> | |
-----+ +--------+ +------------+ +-------