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

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

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

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

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

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