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