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