lines = open("input.txt", 'r').read().splitlines()

sum = 0
words = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]

for l in lines:
    first = ""
    firstFound = False
    last = ""
    lastFound = False
    n = len(l)
    for i in range(n):
        if not firstFound and l[i].isnumeric():
            first = l[i]
            firstFound = True
        if not lastFound and l[-i-1].isnumeric():
            last = l[-i-1]
            lastFound = True
        for j in range(len(words)):
            m = len(words[j])
            if not firstFound and l[i:i+m] == words[j]:
                first = str(j)
                firstFound = True
            if not lastFound and l[-(i+m):n-i] == words[j]:
                last = str(j)
                lastFound = True
        if firstFound and lastFound:
            break
    s = first + last
    sum += int(s)

print(sum)