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