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