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