[(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),(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)]
