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