#118. Four-digit number: sum of the digits
You get a four-digit number. Find its **sum of the digits**.
### Input
One integer (1000 ≤ n ≤ 9999).
### Output
One integer.
Examples
Input
9559
Output
28
Input
5923
Output
19
💡 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.