function numbersWords([arg1]){
    let num = Number(arg1);

    let firstDigit = Math.trunc(num / 10);
    let secondDigit = num % 10;

    if (num === 0){
        console.log("zero");
    } else if (num === 1){
        console.log("one");
    } else if (num === 2){
        console.log("two");
    } else if (num === 3){
        console.log("three");
    } else if (num === 4){
        console.log("four");
    } else if (num === 5){
        console.log("five");
    } else if (num === 6){
        console.log("six");
    } else if (num === 7){
        console.log("seven");
    } else if (num === 8){
        console.log("eight");
    } else if (num === 9){
        console.log("nine");
    } else if (num === 10){
        console.log("ten");
    } else if (num === 11){
        console.log("eleven");
    } else if (num === 12){
        console.log("twelve");
    } else if (num === 13){
        console.log("thirteen");
    } else if (num === 14){
        console.log("fourteen");
    } else if (num === 15){
        console.log("fifteen");
    } else if (num === 16){
        console.log("sixteen");
    } else if (num === 17){
        console.log("seventeen");
    } else if (num === 18){
        console.log("eighteen");
    } else if (num === 19){
        console.log("nineteen");
    }

    if (firstDigit === 2){
        firstDigit = "twenty";
    } else if (firstDigit === 3){
        firstDigit = "thirty";
    } else if (firstDigit === 4){
        firstDigit = "forty";
    } else if (firstDigit === 5){
        firstDigit = "fifty";
    } else if (firstDigit === 6){
        firstDigit = "sixty";
    } else if (firstDigit === 7){
        firstDigit = "seventy";
    } else if (firstDigit === 8){
        firstDigit = "eighty";
    } else if (firstDigit === 9){
        firstDigit = "ninety";
    }

    if (secondDigit === 1){
        secondDigit = "one";
    } else if (secondDigit === 2){
        secondDigit = "two";
    } else if (secondDigit === 3){
        secondDigit = "three";
    } else if (secondDigit === 4){
        secondDigit = "four";
    } else if (secondDigit === 5){
        secondDigit = "five";
    } else if (secondDigit === 6){
        secondDigit = "six";
    } else if (secondDigit === 7){
        secondDigit = "seven";
    } else if (secondDigit === 8){
        secondDigit = "eight";
    } else if (secondDigit === 9){
        secondDigit = "nine";
    }

    if (num > 20 && num < 100 && secondDigit !== 0){
        console.log(firstDigit + " " + secondDigit);
    }

    if(secondDigit === 0 && num !== 100 && firstDigit !== 0 && firstDigit !== 1){
        console.log(firstDigit);
    }

    if(num === 100){
        console.log("one hundred");
    }
}