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