[(0,1),(1,2),(1,3),(2,4),(4,5),(2,6),(4,7),(5,7),(6,8),(0,9),(6,10),(5,11),(11,12),(8,12),(12,13),(3,14),(3,15),(9,16),(11,17),(7,18),(9,19),(8,20),(10,21),(10,22)]
[(0,1),(0,2),(2,3),(2,4),(1,4),(1,5),(3,5),(3,6),(4,7),(5,8),(6,9),(7,10),(10,11),(10,12),(8,13),(9,14),(7,15),(9,16),(12,17),(12,18),(8,19),(11,20),(11,21),(6,22)]
