NumbersTo100

import java.util.Scanner;

public class NumbersTo100 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int number = Integer.parseInt(scan.nextLine());

        int ones, decimals = 0;
        String name = "";

        if (number == 100){
            name = "one hundred";
        }
        else if(number >= 0 && number < 100){
            ones = number % 10;
            decimals = number / 10;

            String var = "hello";
            if (decimals == 0){
                switch (ones){
                    case 0: name = "zero"; break;
                    case 1: name = "one"; break;
                    case 2: name = "two"; break;
                    case 3: name = "three"; break;
                    case 4: name = "four"; break;
                    case 5: name = "five"; break;
                    case 6: name = "six"; break;
                    case 7: name = "seven"; break;
                    case 8: name = "eight"; break;
                    case 9: name = "nine"; break;
                }
            }
            else if (decimals == 1){
                switch (ones){
                    case 0: name = "ten"; break;
                    case 1: name = "eleven"; break;
                    case 2: name = "twelve"; break;
                    case 3: name = "thirteen"; break;
                    case 4: name = "fourteen"; break;
                    case 5: name = "fifteen"; break;
                    case 6: name = "sixteen"; break;
                    case 7: name = "seventeen"; break;
                    case 8: name = "eighteen"; break;
                    case 9: name = "nineteen"; break;
                }
            }
            else if(decimals > 1){
                switch (decimals){
                    case 2: name = "twenty"; break;
                    case 3: name = "thirty"; break;
                    case 4: name = "fourty"; break;
                    case 5: name = "fifty"; break;
                    case 6: name = "sixty"; break;
                    case 7: name = "seventy"; break;
                    case 8: name = "eighty"; break;
                    case 9: name = "ninety"; break;
                }
                switch (ones){
                    case 1: name += " one"; break;
                    case 2: name += " two"; break;
                    case 3: name += " three"; break;
                    case 4: name += " four"; break;
                    case 5: name += " five"; break;
                    case 6: name += " six"; break;
                    case 7: name += " seven"; break;
                    case 8: name += " eight"; break;
                    case 9: name += " nine"; break;
                }
            }
        }
        else{
            System.out.println("invalid number");
        }

        System.out.println(name);
    }
}