[(0,1),(0,2),(2,3),(3,4),(3,5),(1,5),(5,6),(1,7),(7,8),(2,8),(4,9),(8,10),(6,10),(6,11),(10,12),(11,13),(12,13),(13,14),(9,15),(14,15),(7,16),(16,17),(17,18),(16,18),(12,19),(18,19),(4,20),(20,21),(14,22),(11,23),(17,24),(23,25),(24,25),(22,26),(15,26),(24,27),(20,27),(22,28),(25,29),(19,30),(21,31),(21,32),(27,33),(26,34),(9,35),(23,36),(28,37),(28,38)]
[(0,1),(1,2),(1,3),(0,3),(2,4),(2,5),(4,5),(3,6),(5,7),(6,8),(4,9),(6,9),(7,10),(9,10),(8,11),(8,12),(7,13),(12,13),(10,14),(11,15),(14,15),(14,16),(13,16),(15,17),(17,18),(11,19),(17,20),(20,21),(18,21),(20,22),(16,23),(19,24),(21,24),(24,25),(18,25),(23,26),(22,27),(22,28),(28,29),(26,30),(27,31),(19,32),(27,33),(12,34),(25,35),(26,36),(23,37),(28,38)]
