#810. Different prime divisors
You get n. How many different prime divisors does n have?
### Input
One integer n (2 ≤ n ≤ 10⁹).
### Output
A number.
Examples
Input
256745330
Output
3
Input
587446223
Output
4
💡 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.