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