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

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

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

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

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

What relation is your aunt's husband's son's brother's daughter in law to you ?