[(0,1),(1,2),(0,2),(2,3),(3,4),(1,5),(5,6),(6,7),(5,7),(4,8),(6,8),(3,9),(9,10),(8,10),(9,11),(10,11),(11,12),(12,13),(13,14),(13,15),(14,16),(7,16),(16,17),(4,18),(18,19),(15,20),(20,21),(18,22),(15,22),(14,23),(19,23),(23,24),(22,25),(25,26),(25,27),(12,28),(17,28),(17,29),(24,29),(27,30),(28,31),(21,31),(29,32),(31,33),(20,34),(21,34),(34,35),(35,36),(36,37),(37,38),(30,38),(19,39),(26,39),(36,40),(35,41),(33,42),(37,43),(42,43),(40,44),(32,44),(32,45),(33,45),(27,46),(42,46),(30,47),(24,47),(38,48),(41,48),(41,49),(43,50),(40,51),(26,52),(44,53),(39,54),(47,55),(48,56),(45,57),(46,58)]
[(0,1),(1,2),(0,2),(1,3),(3,4),(2,4),(4,5),(3,5),(5,6),(6,7),(6,8),(7,9),(8,9),(9,10),(10,11),(8,11),(11,12),(7,12),(10,13),(12,13),(13,14),(14,15),(15,16),(14,17),(15,18),(18,19),(19,20),(18,20),(16,21),(21,22),(19,22),(21,23),(20,23),(22,24),(16,24),(17,25),(23,26),(25,26),(24,27),(26,28),(25,28),(28,29),(29,30),(29,31),(31,32),(30,32),(30,33),(17,33),(31,34),(32,34),(33,35),(27,35),(35,36),(34,36),(36,37),(27,38),(37,38),(37,39),(38,40),(39,41),(40,42),(42,43),(41,44),(43,44),(40,45),(39,46),(43,47),(46,48),(47,49),(42,50),(48,51),(48,52),(47,53),(45,54),(44,55),(41,56),(45,57),(46,58)]
