#cording: utf-8
import re

s = list(input())
pattern = r'([+-]?[0-9]+\.?[0-9]*)'
num = []
for i in s:
    a = re.findall(pattern, i)
    if len(a) != 0:
        num.append(a)
s = 0
for i in num:
    s = s + int(i[0])
print(s)