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graph LR subgraph O 1(1) 2(-2) 3(3) 4(-4) 5(5) end subgraph J a(-1) b(2) c(-3) d(4) e(-5) end subgraph N [Relation N (xy > 0)] 1 --> a 1 --> b 1 --> c 1 --> d 1 --> e 2 --> b 2 --> d 3 --> a 3 --> b 3 --> c 3 --> d 3 --> e 4 --> b 4 --> d 5 --> a 5 --> b 5 --> c 5 --> d 5 --> e end subgraph M [Relation M (x-y < 0)] 1 --> b 1 --> d 2 --> a 2 --> c 2 --> e 3 --> d 4 --> a 4 --> c 4 --> e 5 --> d end style O fill:#f9f,stroke:#333,stroke-width:2px style J fill:#ccf,stroke:#333,stroke-width:2px style N fill:#9f9,stroke:#333,stroke-width:2px style M fill:#ff9,stroke:#333,stroke-width:2px
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