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

What relation is your daughter's grandmother's son's niece to you ?

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

What relation is your cousin's mother's niece's sister to you ?

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

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