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