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