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