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