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