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