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