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