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