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