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