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