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