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