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