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