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