String Matching in an Array
Given an array of string words, return all strings in words that are a substring of another word.
Given an array of string words, return all strings in words that are a substring of another word. You can return the answer in any order.
Example 1
Input: words = ["mass","as","hero","superhero"]
Output: ["as","hero"]
Explanation: "as" is substring of "mass" and "hero" is substring of "superhero". ["hero","as"] is also a valid answer.
Example 2
Input: words = ["leetcode","et","code"]
Output: ["et","code"]
Explanation: "et", "code" are substring of "leetcode".
Example 3
Input: words = ["blue","green","bu"]
Output: []
Explanation: No string of words is substring of another string.
Constraints
- 1 <= words.length <= 100
- 1 <= words[i].length <= 30
- words[i] contains only lowercase English letters.
- All the strings of words are unique.
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