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