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