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