[(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),(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)]
