#!/usr/bin/python

inputfile = open("input.txt", "r")
lines = inputfile.readlines()
solution = 0
for line in lines:
    line = line.replace("one", "o1e")
    line = line.replace("two", "t2o")
    line = line.replace("three", "t3e")
    line = line.replace("four", "f4r")
    line = line.replace("five", "f5e")
    line = line.replace("six", "s6x")
    line = line.replace("seven", "s7n")
    line = line.replace("eight", "e8t")
    line = line.replace("nine", "n9e")
    sol = ""
    print(line)
    for letter in line:
        if letter.isdigit():
            sol+=letter
    sol = sol[0] + sol[len(sol)-1]
    print(sol)
    solution += int(sol)
print(solution)