[(0,1),(0,2),(2,3),(1,3),(3,4),(4,5),(4,6),(2,6),(6,7),(1,7),(5,8),(8,9),(9,10),(5,10),(10,11),(11,12),(8,13),(12,13),(12,14),(7,14),(11,15),(14,15),(13,16),(15,17),(17,18),(16,19),(18,19),(9,20),(19,20),(20,21),(21,22),(17,22),(21,23),(22,23),(18,24),(23,24),(16,25),(24,25),(25,26),(26,27),(27,28),(26,29),(28,30),(29,30),(27,31),(28,31),(31,32),(32,33),(30,33),(33,34),(34,35),(29,35),(32,36),(36,37),(36,38),(34,38),(37,39),(38,40),(37,41),(40,41),(39,42),(39,43),(40,43),(42,44),(42,45),(43,46),(35,47),(41,48)]
[(0,1),(0,2),(2,3),(1,3),(3,4),(2,5),(1,5),(4,6),(5,7),(6,7),(4,8),(7,8),(6,9),(9,10),(10,11),(9,11),(10,12),(12,13),(11,14),(13,15),(14,16),(16,17),(15,17),(15,18),(12,18),(8,19),(18,20),(17,20),(19,21),(20,21),(19,22),(16,22),(13,23),(23,24),(24,25),(21,25),(24,26),(22,27),(26,27),(27,28),(25,29),(26,29),(29,30),(23,31),(30,31),(28,32),(32,33),(30,34),(33,34),(34,35),(33,36),(31,36),(35,37),(32,37),(37,38),(38,39),(35,40),(28,40),(14,41),(39,41),(39,42),(42,43),(38,43),(43,44),(40,45),(41,46),(36,47),(42,48)]
