package main

import java.io.File

fun main() {
    var sum = 0
    File("../input.txt").forEachLine{
        var firstDigit = ""
        var lastDigit = ""

        for (c in replaceStrWithDigits(it)) {
            if (c.isDigit()) {
                lastDigit = c.toString()
                if (firstDigit == "") {
                    firstDigit = c.toString()
                }
            }
        }

        sum += (firstDigit + lastDigit).toInt()
    }
    println(sum)
}

fun replaceStrWithDigits(line: String): String {
    var s = line
    var words = arrayOf("one", "two", "three", "four", "five", "six", "seven", "eight", "nine")
    var i = 0
    while (i < s.length) {
        for (w in words.indices) {
            if (s.slice(i..s.length-1).startsWith(words[w])) {
                s = s.replaceRange(i, i + 1, (w + 1).toString())
                break
            }
        }
        i += 1
    }
    return s
}