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