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