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