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