Reorganize String
Given a string s, check if the letters can be rearranged so that two characters that are adjacent to each other are not the same.
If possible, output any possible result. If not possible, return the empty string.
Example 1:
Input:s = "aab"
Output: aba
Example 2:
Input:s = "aaab"
Output: ``
Note:
s will consist of lowercase letters and have length in the range [1, 500].