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