[(0,1),(1,2),(0,2),(1,3),(2,4),(3,5),(4,5),(4,6),(6,7),(7,8),(5,9),(7,9),(8,10),(3,11),(9,12),(6,13),(12,14),(14,15),(15,16),(13,16),(15,17),(17,18),(16,18),(11,19),(10,20),(14,21),(13,22),(8,23),(18,24),(17,25),(10,26),(11,27),(12,28)]
[(0,1),(0,2),(1,2),(2,3),(3,4),(1,4),(4,5),(3,5),(5,6),(6,7),(7,8),(7,9),(8,9),(8,10),(10,11),(11,12),(11,13),(13,14),(13,15),(9,16),(6,17),(16,18),(15,18),(10,19),(12,20),(15,21),(17,22),(14,23),(14,24),(18,25),(12,26),(16,27),(17,28)]
