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