[(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)]
[(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)]
