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