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