Telephonic (Google doc):

- Design and implement a data structure that can supports insert, update, delete, search and getRandom operations for strings in constant time (not necessary to compile).
- Given a sorted dictionary (array of words) of an alien language, find order of characters in the language.
Examples:
Input: words[] = {"baa", "abcd", "abca", "cab", "cad"}
Output: Order of characters is 'b', 'd', 'a', 'c'

Question

Telephonic (Google doc):

 - Design and implement a data structure that can supports insert, update, delete, search and getRandom operations for strings in constant time (not necessary to compile).
 - Given a sorted dictionary (array of words) of an alien language, find order of characters in the language.
Examples:
Input:  words[] = {"baa", "abcd", "abca", "cab", "cad"}
Output: Order of characters is 'b', 'd', 'a', 'c'

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