<<<< 1:1-node1: <<<< 2:1-node1a: 2:2-node1b: 2:3-node1c: >>>> 1:2-node2: <<<< 2:1-node2a: <<<< 3:1-node2a1: 3:2-node2a2: >>>> 2:2-node2b: >>>> 1:3-node3: <<<< 2:1-node3a: 2:2-node3b: >>>> >>>>