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