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