true
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1: 6-----5--7---2----0----3---4
2: ---0---3--4--1---5----6-7---
3: -7-----2---0--6-4------1--5-
4: --5-6-----2-7---3---0------1
5: --4---1-6------0-2---7----3-
6: 1---4---5-----3----7--2--0--
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(5,6) (1,7) (2,4) (0,3) 
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(3,4) (2,5) (0,1) (6,7) 
(0,4) (5,7) (2,6) (1,3) 
(2,7) (0,6) (3,5) (1,4) 
nodes: 85   cpu: 3346