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