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