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