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