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