[(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),(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)]
