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