--description--

Given a string containing digits and other characters, return the sum of all numbers in the string.

Treat consecutive digits as a single number. For example, "13" counts as 13, not 1 + 3.
Ignore any non-digit characters.

--hints--

string_sum("3apples2bananas") should return 5.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(string_sum("3apples2bananas"), 5)`)
}})

string_sum("10cats5dogs2birds") should return 17.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(string_sum("10cats5dogs2birds"), 17)`)
}})

string_sum("125344") should return 125344.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(string_sum("125344"), 125344)`)
}})

string_sum("a1b20c300") should return 321.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(string_sum("a1b20c300"), 321)`)
}})

string_sum("a12b34c56d78e90f123g456h789i0j1k2l3m4n5") should return 1653.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(string_sum("a12b34c56d78e90f123g456h789i0j1k2l3m4n5"), 1653)`)
}})

def string_sum(s):

    return s

import re
def string_sum(s):
    numbers = re.findall(r'\d+', s)
    return sum(int(num) for num in numbers)