[(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),(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)]
