#619. Values without repeats (increasing)
You are given a list of integers. **Values without repeats (increasing)**. If there is no second value, print `None`. If the answer has several numbers, separate them with spaces.
### Input
The first line has n, the second line has n integers separated by spaces.
### Output
The answer.
Examples
Input
4 13 -5 -12 -13
Output
-13 -12 -5 13
Input
7 2 15 -19 7 3 -13 -3
Output
-19 -13 -3 2 3 7 15
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.