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