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