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