Sum of Digits in a String

You are given a string that contains both alphabetic characters and digits. Your task is to compute the sum of all the digits present in the string.

For example, given the string \( a1b2c3 \), the result should be \( 1+2+3=6 \). Your solution should read the input from standard input (stdin) and output the result to standard output (stdout).

inputFormat

The input consists of a single line containing a non-empty string with alphanumeric characters.

outputFormat

The output is a single integer representing the sum of all numeric digits found in the input string.

a1b2c3

6