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