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