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