#!python3
import re

digits = "one two three four five six seven eight nine".split(" ")

nums_of_digits = dict((b, str(a+1)) for (a, b) in enumerate(digits))
or_of_digits = "|".join(digits)
first_re = re.compile("\D*?(\d|" + or_of_digits + ").*")
second_re = re.compile(".*(\d|" + or_of_digits + ")\D*?")

with open("input01d", "r") as f:
	s = 0
	for line in f.readlines():
		first = first_re.match(line).group(1)
		second = second_re.match(line).group(1)
		if first in digits:
			first = nums_of_digits[first]
		if second in digits:
			second = nums_of_digits[second]
		s += int(first + second)
	print(s)