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