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