Four

import java.util.Scanner;

public class Numbers {
    public static void main(String[] args){
        Conversion conObj = new Conversion();
        Scanner sc = new Scanner(System.in);
        int newNum = 0, theNum = 0;

        do{
            System.out.println("Input a number between 0 and 20");
            theNum = sc.nextInt();
        }while(theNum<0 || theNum>20);

        newNum = theNum;

        do{
            conObj.setNum(newNum);
            conObj.numConv();

            newNum = conObj.numConv().length();

            System.out.println(conObj.numConv() + " is " + newNum);

        }while(newNum != 4);

        System.out.println("Four is the magic number.");

    }
}



public class Conversion {

    private int num;
    private String conversion;

    public int getNum(){
        return this.num;
    }

    public void setNum(int num){
        this.num = num;
    }

    public String numConv(){
        switch (this.num){
            case 0: conversion = "zero";
                    break;
            case 1: conversion = "one";
                    break;
            case 2: conversion = "two";
                    break;
            case 3: conversion = "three";
                    break;
            case 4: conversion = "four";
                    break;
            case 5: conversion = "five";
                    break;
            case 6: conversion = "six";
                    break;
            case 7: conversion = "seven";
                    break;
            case 8: conversion = "eight";
                    break;
            case 9: conversion = "nine";
                    break;
            case 10: conversion = "ten";
                    break;
            case 11: conversion = "eleven";
                    break;
            case 12: conversion = "twelve";
                    break;
            case 13: conversion = "thirteen";
                    break;
            case 14: conversion = "fourteen";
                    break;
            case 15: conversion = "fifteen";
                    break;
            case 16: conversion = "sixteen";
                    break;
            case 17: conversion = "seventeen";
                    break;
            case 18: conversion = "eighteen";
                    break;
            case 19: conversion = "nineteen";
                    break;
            case 20: conversion = "twenty";
                    break;
        }
        return conversion;
    }

}