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