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