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