[(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),(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)]
