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