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