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