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