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