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