NAME_1, NAME_2 and NAME_3. NAME_1 is NAME_2's mother. NAME_1 is 43 years old. NAME_2 is 18 years old. NAME_3 is NAME_2's teacher who's older than NAME_2's mother. How old is NAME_3 at a minimum? Provide your response in exactly 4 paragraphs (separated nearby paragraphs with 3 aterisk symbols ***).
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