const WORDS: [&'static str; 10] = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];

fn main() {
    let mut total = 0;
    for line in std::io::stdin().lines() {
        let line = line.unwrap();
        if line.len() == 0 { continue }
        let mut c1 = line.len() - 1;
        let mut c2 = 0;
        let mut n1 = 0;
        let mut n2 = 0;
        for (i, word) in WORDS.iter().enumerate() {
            if let Some(d1) = line.find(word) {
                if d1 <= c1 {
                    c1 = d1;
                    n1 = i;
                }
            }
            if let Some(d2) = line.rfind(word) {
                if d2 >= c2 {
                    c2 = d2;
                    n2 = i;
                }
            }
        }
        for (i, word) in ('0'..='9').enumerate() {
            if let Some(d1) = line.find(word) {
                if d1 <= c1 {
                    c1 = d1;
                    n1 = i;
                }
            }
            if let Some(d2) = line.rfind(word) {
                if d2 >= c2 {
                    c2 = d2;
                    n2 = i;
                }
            }
        }
        total += n1*10 + n2;
    }
    println!("{}", total);
}