Final answer:
The Gray Sisters are ancient Greeks mythological figures who shared three eyes and one tooth among them. The sisters, known as the Graeae, were daughters of sea deities and had to share their body parts which resulted in a unique mythological existence.
Step-by-step explanation:
The Gray Sisters are figures from ancient Greek mythology. These sisters shared three eyes and one tooth among them. They were known as the Graeae and were daughters of the sea deities Phorcys and Ceto. At birth, they were already old women and hence their name which means 'The Old Ones'. They had to share their eyes and tooth which resulted in them taking turns in seeing, eating, and speaking while the others were left blind and helpless. The sharing of the eyes and tooth among the Gray Sisters is a representation of their unique mythological existence.
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