use std::fs::File;
use std::io::{self, BufRead, BufReader};
use regex::Regex;
use regex::RegexSet;
use once_cell::sync::Lazy;

fn map(s: &str) -> i32 {
    match s {
        "zero" => 0,
        "one" => 1,
        "two" => 2,
        "three" => 3,
        "four" => 4,
        "five" => 5,
        "six" => 6,
        "seven" => 7,
        "eight" => 8,
        "nine" => 9,
        "0" => 0,
        "1" => 1,
        "2" => 2,
        "3" => 3,
        "4" => 4,
        "5" => 5,
        "6" => 6,
        "7" => 7,
        "8" => 8,
        "9" => 9,
        _ => unreachable!()
    }
}

fn get(s: &str) -> i32 {
    static RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"^.*?(zero|one|two|three|four|five|six|seven|eight|nine|0|1|2|3|4|5|6|7|8|9)").unwrap());
    static RER: Lazy<Regex> = Lazy::new(|| Regex::new(r"^.*?(9|8|7|6|5|4|3|2|1|0|enin|thgie|neves|xis|evif|ruof|eerht|owt|eno|orez)").unwrap());
    let rev = s.chars().rev().collect::<String>();

    let Some(caps) = RE.captures(s) else {
        return -1;
    };

    let a = map(&caps[1]);

    let Some(caps) = RER.captures(&rev) else {
        return -1;
    };

    let t = caps[1].chars().rev().collect::<String>();
    let b = map(&t);

    return 10 * a + b;
}

fn main() -> anyhow::Result<()> {
    let file = File::open("input")?;
    let reader = BufReader::new(file);
    let mut sum = 0;
    for line in reader.lines() {
        let l = line?;
        let m = get(&l);
        sum += m;
    }

    println!("{}", sum);

    Ok(())
}