Maximum Numeric Substring

Given a string s consisting of letters and digits, your task is to find the maximum numeric value among all contiguous digit substrings of s. A numeric substring is defined as a sequence of one or more digits, and any leading zeros should be ignored when interpreting its value.

If no digits are found in the string, the output should be 0.

For example, if s = "a123bc34d8ef34", the digit substrings are "123", "34", "8", and "34". The maximum among these interpreted as numbers is 123.

You are required to read the input from stdin and print the result to stdout.

inputFormat

A single line containing the string s. The string may contain letters and digits.

outputFormat

An integer, printed on a single line, representing the maximum numeric value found in the substrings of s. If there are no digits, output 0.## sample

a123bc34d8ef34

123