#!/usr/bin/env python3
import sys
import re

num_values = dict(
    one="1",
    two="2",
    three="3",
    four="4",
    five="5",
    six="6",
    seven="7",
    eight="8",
    nine="9",
)

patterns = "one two three four five six seven eight nine 1 2 3 4 5 6 7 8 9".split()

sum = 0
for line in sys.stdin:
    first = len(line)
    last = 0
    nums = []
    for pat in patterns:
        for m in re.finditer(pat, line):
            nums.append((m.start(), pat))

    nums.sort()
    first_word = nums[0][1]
    last_word = nums[-1][1]

    first_word = num_values.get(first_word, first_word)
    last_word = num_values.get(last_word, last_word)

    value = int(first_word + last_word)
    sum += value

print(sum)