3. Four different numbers $a, b, c, d$, greater than one and not divisible by 5, are such that $\gcd(a, b) = \gcd(c, d)$ and $\operatorname{lcm}(a, b) = \operatorname{lcm}(c, d)$. What is the smallest possible value of $a + b + c + d$?
Answer: 24

## Examples of how to write the answer:

17

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