Graph

```mermaid graph TD;

A B C D E

A → B A → C A → D B → A B → C C → A C → B C → D D → A D → C

classDef red fill:#FF0000,stroke:#000,color:#fff; classDef green fill:#008000,stroke:#000,color:#fff; classDef blue fill:#0000FF,stroke:#fff,color:#fff; classDef yellow fill:#FFFF00,stroke:#000,color:#000; classDef violet fill:#8A2BE2,stroke:#000,color:#fff; classDef gray fill:#808080,stroke:#000,color:#fff; classDef orange fill:#FFA500,stroke:#000,color:#fff; class A red class B green class C blue class D green class E red ```