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What relation is your brother's aunt's nephew's sister to you ?

What relation is your brother's mother's sister's nephew's uncle to you ?

What relation is your aunt's niece's father's daughter's grandfather to you ?

What relation is your uncle's son's mother's daughter to you ?

What relation is your mother's son's cousin's brother's father to you ?

What relation is your uncle's daughter's mother's niece's aunt to you ?