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