You are given an array of integers. The special property of the array is that exactly two different elements occur once while other elements occur twice.

You are required to determine those two elements.

Input format

• First line: Integer $N$ denoting the number of elements in the array
• Second line: $N$ space-separated integers denoting the values in the array

Output format

Print two space-separated integers that occur once in the array in ascending order.

Constraints

$1 \leq N \leq 10^6$

$1 \leq A_i \leq 10^6$, where $A_i$ denotes the $i_{th}$ element in the array