function letterize(input) {
    //how many numbers to letterize?
    let n = Number(input[0]);

    //letterize number 1 to n
    for (let index = 1; index <= n; index++) {
        let number = Number(input[index]);
        let numberAbs = Math.abs(number);

        //too small, too large, less than 3 digits
        if (number < -999) {
            console.log("too small");
            continue;
        } else if (number > 999) {
            console.log("too large");
            continue;
        } else if (numberAbs < 100) {
            continue;
        }

        //letterize first digit (hundreds)
        let hundreds = "";
        switch (Math.trunc(numberAbs / 100) % 10) {
            case 1: hundreds = "one-hundred"; break;
            case 2: hundreds = "two-hundred"; break;
            case 3: hundreds = "three-hundred"; break;
            case 4: hundreds = "four-hundred"; break;
            case 5: hundreds = "five-hundred"; break;
            case 6: hundreds = "six-hundred"; break;
            case 7: hundreds = "seven-hundred"; break;
            case 8: hundreds = "eight-hundred"; break;
            case 9: hundreds = "nine-hundred"; break;
        }
        //add " and" if second and third digit != 0
        if (numberAbs % 100 != 0) {
            hundreds = hundreds + " and";
        }

        //letterize second digit (tens)
        let tens = "";
        switch (Math.trunc(numberAbs / 10) % 10) {
            case 1:
                switch (number % 100) {
                    case 10: tens = " ten"; break;
                    case 11: tens = " eleven"; break;
                    case 12: tens = " twelve"; break;
                    case 13: tens = " thirteen"; break;
                    case 14: tens = " fourteen"; break;
                    case 15: tens = " fifteen"; break;
                    case 16: tens = " sixteen"; break;
                    case 17: tens = " seventeen"; break;
                    case 18: tens = " eighteen"; break;
                    case 19: tens = " nineteen"; break;
                }
                break;
            case 2: tens = " twenty"; break;
            case 3: tens = " thirty"; break;
            case 4: tens = " fourty"; break;
            case 5: tens = " fifty"; break;
            case 6: tens = " sixty"; break;
            case 7: tens = " seventy"; break;
            case 8: tens = " eighty"; break;
            case 9: tens = " ninety"; break;
        }

        //letterize third digit (ones) if second digit != 1
        let ones = "";
        if (Math.trunc(numberAbs / 10) % 10 != 1) {
            switch (numberAbs % 10) {
                case 1: ones = " one"; break;
                case 2: ones = " two"; break;
                case 3: ones = " three"; break;
                case 4: ones = " four"; break;
                case 5: ones = " five"; break;
                case 6: ones = " six"; break;
                case 7: ones = " seven"; break;
                case 8: ones = " eight"; break;
                case 9: ones = " nine"; break;
            }
        }

        //concatenate hundreds, tens and ones
        let letterizedNumber = hundreds + tens + ones;
        //add "minus " for negative numbers
        if (number < 0) {
            letterizedNumber = "minus " + letterizedNumber;
        }
        //print letterized number
        console.log(letterizedNumber);
    }
}