[(0,1),(0,2),(1,3),(3,4),(1,5),(5,6),(4,7),(3,8),(6,9),(2,10),(9,11),(7,11),(2,12),(12,13),(8,13),(13,14),(10,15),(5,16),(9,16),(14,17),(17,18),(15,19),(18,19),(19,20),(16,21),(18,22),(20,23),(7,24),(21,25),(6,25),(10,26),(8,27),(21,28),(20,29),(14,29),(28,30),(26,31),(31,32),(26,32),(32,33),(28,33),(23,34),(24,34),(24,35),(11,35),(30,36),(34,37),(33,37),(31,38),(38,39),(17,40),(25,41),(35,41),(22,42),(40,43),(22,43),(39,44),(4,45),(41,46),(45,47),(12,47),(29,48),(37,49),(48,50),(27,50),(43,51),(49,51),(40,52),(46,52),(50,53),(48,53),(30,54),(42,55),(44,56),(54,56),(52,57),(39,58),(46,58),(15,59),(38,60),(56,61),(23,62),(53,63),(42,64),(55,65),(27,66),(36,67),(55,68),(47,69),(36,70),(57,71),(57,72),(45,73),(58,74),(49,75),(51,76),(44,77),(54,78)]
[(0,1),(1,2),(0,2),(2,3),(1,3),(3,4),(4,5),(5,6),(5,7),(6,7),(4,8),(6,8),(7,9),(9,10),(8,10),(9,11),(11,12),(12,13),(13,14),(11,15),(14,16),(10,17),(17,18),(14,18),(18,19),(16,20),(12,21),(15,22),(13,23),(20,24),(22,25),(21,25),(21,26),(22,27),(24,27),(23,28),(16,29),(27,30),(15,30),(17,31),(28,32),(23,33),(26,33),(30,34),(34,35),(19,35),(20,36),(29,37),(31,38),(36,38),(28,39),(39,40),(29,41),(25,42),(31,42),(36,43),(37,43),(33,44),(34,44),(35,45),(38,46),(19,47),(43,48),(44,48),(41,49),(47,49),(42,50),(24,50),(46,51),(46,52),(49,52),(48,53),(53,54),(51,55),(52,55),(40,56),(56,57),(57,58),(55,59),(57,60),(51,61),(39,62),(45,63),(58,64),(47,65),(41,66),(40,67),(32,68),(54,69),(32,70),(54,71),(53,72),(37,73),(58,74),(45,75),(26,76),(56,77),(50,78)]
