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