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

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

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

What relation is your sister's aunt's niece's brother in law to you ?

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

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