Given a string s and an array of strings words, determine whether s is a prefix string of words.
A string s is a prefix string of words if s can be made by concatenating the first k strings in words for some positive k no larger than words.length.
Return true if s is a prefix string of words, or false otherwise.
1 <= words.length <= 1001 <= words[i].length <= 201 <= s.length <= 1000words[i] and s consist of only lowercase English letters.s = "iloveleetcode", words = ["i","love","leetcode","apples"]trues = "iloveleetcode", words = ["apples","i","love","leetcode"]false