this one uses the filter(), sort(), and join() methods

kata link: https://www.codewars.com/kata/56069d0c4af7f633910000d3/javascript

filter() info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
sort() info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort
join() info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join

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