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