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