[(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)]
[(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)]
