Node_id Neighbours
15 1 16
1 15 18 12 3
3 1 20 6 12
20 3 12 16
12 20 6 3 1 18
6 12 7 3 16
7 6 18 16
18 7 16 12 1
16 18 15 7 6 20
ELECT 5 18 7
ELECT 8 3
ELECT 15 12 1
ELECT 50 18
FAIL 20
FAIL 6
FAIL 3