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