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