[(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),(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)]
