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