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

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

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

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

What relation is your brother's father's sister's niece to you ?

What relation is your mother's sister's niece's father in law to you ?