Flowchart: Three Parallel Edges Plus Reciprocal (TD)
Three labeled parallel edges plus a reciprocal edge back, in a top-down graph. In ASCII the third lane keeps its own arrowhead row.
flowchart-three-parallel-edges-plus-reciprocal-td.mmd
flowchart TD
A -->|first| B
A -->|second| B
A -->|third| B
B -->|back| A