public class BeerSong
{

    int n;
    String beer;



    String[] numbers =
    {
        "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten",
        "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen",
        "nineteen"
    };

    String[] tens =
    {
        "", "", "Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety",
        "One hundred"
    };

    public String numberBeers(int n)
    {

        if ( n<20 )
        {
            beer = numbers[n];
        }

        else if ( n>=20 )
        {
            if( n%10 == 0 )
            {
                beer = tens[n/10];
            }

            else
            {
                beer = tens[( n - (n%10) )/10] + "-" + numbers[n%10];
            }
        }

        return beer;
    }


    public void singSong()
    {
        while(n<=100)
            {
                System.out.println(numberBeers(n) + " bottles of beer on the wall.");
                n++;
            }
    }

}