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