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