[(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)]
[(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)]
