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