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