OIM 2018 Problem 4

A set $X$ of positive integers is said to be iberic if $X$ is a subset of $\{2, 3, \dots, 2018\}$ , and whenever $m, n$ are both in $X$ , $\gcd(m, n)$ is also in $X$ . An iberic set is said to be olympic if it is not properly contained in any other iberic set. Find all olympic iberic sets that contain the number $33$ .