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