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