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