#5. Square perimeter
You get the side a of a square. Find its perimeter (4·a).
### Input
Each on its own line: a (1 ≤ value ≤ 50).
### Output
One integer.
Examples
Input
20
Output
80
Input
35
Output
140
💡 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.