import os

const input = os.read_file('./input.txt')!

//const input = "two1nine
//eightwothree
//abcone2threexyz
//xtwone3four
//4nineeightseven2
//zoneight234
//7pqrstsixteen"


fn replace_letter_numbers(txt string) string {
    mut tmp := txt

    tmp = tmp.replace('one', 'o1e')
    tmp = tmp.replace('two', 't2o')
    tmp = tmp.replace('three', 't3e')
    tmp = tmp.replace('four', 'f4r')
    tmp = tmp.replace('five', 'f5e')
    tmp = tmp.replace('six', 's6x')
    tmp = tmp.replace('seven', 's7n')
    tmp = tmp.replace('eight', 'e8t')
    tmp = tmp.replace('nine', 'n9e')

    return tmp
}

fn main() {
    lines := input.split('\n')
    mut sum := 0

    for line in lines {
        if line.is_blank() {
            continue
        }

        //println('-> line: ${line}')
        replaced := replace_letter_numbers(line)
        //println('-> replaced: ${replaced}')
        trimmed := replaced.trim('abcdefghijklmnopqrstuvwxyz')
        //println('-> trimmed: ${trimmed}')
        n := trimmed[0].ascii_str() + trimmed[trimmed.len-1].ascii_str()
        //println('=> n: ${n}')
        sum += n.int()
    }

    println("Result is ${sum}")
}