In each input array, every number repeats at least once, except for two. Write a function that returns the two unique numbers.

Examples

returnUnique([1, 9, 8, 8, 7, 6, 1, 6]) ➞ [9, 7]

returnUnique([5, 5, 2, 4, 4, 4, 9, 9, 9, 1]) ➞ [2, 1]

returnUnique([9, 5, 6, 8, 7, 7, 1, 1, 1, 1, 1, 9, 8]) ➞ [5, 6]

Notes

Keep the same ordering in the output.