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/*

(This is a slightly harder version of the fix34 problem.) Return an array that contains exactly the same numbers as the given array, but rearranged so that every 4 is immediately followed by a 5. Do not move the 4's, but every other number may move. The array contains the same number of 4's and 5's, and every 4 has a number after it that is not a 4. In this version, 5's may appear anywhere in the original array.

fix45([5, 4, 9, 4, 9, 5]) → [9, 4, 5, 4, 5, 9]

fix45([1, 4, 1, 5]) → [1, 4, 5, 1]

fix45([1, 4, 1, 5, 5, 4, 1]) → [1, 4, 5, 1, 1, 4, 5]

*/

public class Fix45 {

}