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