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