import * as fs from "fs"
let data = fs.readFileSync("inputday1.txt").toString()

data = data.replaceAll("one", "o1e")
data = data.replaceAll("two", "t2o")
data = data.replaceAll("three", "t3e")
data = data.replaceAll("four", "f4r")
data = data.replaceAll("five", "f5e")
data = data.replaceAll("six", "s6x")
data = data.replaceAll("seven", "s7n")
data = data.replaceAll("eight", "e8t")
data = data.replaceAll("nine", "n9e")

let sumNum = 0
let lines = data.split("\n")

for (let line of lines){
    for (let char of line){
        isNum(char)
    }
}

function isNum(testchar){
    if (testchar == "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"){
        return testchar
    }
}