Digit Sum Calculation

Given a non-negative integer represented as a string, your task is to compute the sum of its individual digits. For example, if the input string is "12345", the output should be 15 (since 1+2+3+4+5 = 15).

Note that the input is provided as a string and may contain leading zeros. Your solution must read from standard input (stdin) and output the result to standard output (stdout).

inputFormat

The input consists of a single line containing a non-negative integer represented as a string. The string may include leading zeros. For example:

12345

outputFormat

Output a single integer representing the sum of all digits in the input string. For the example above, the correct output is:

15

12345

15