How to use the natural.DoubleMetaphone function in natural

furnished to do so, subject to the following conditions:

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THE SOFTWARE.
*/

var natural = require('natural'),
    phonetic = natural.DoubleMetaphone;

var sentence = 'phonetic modules contain algorithms';
var stdin = process.openStdin();
stdin.setEncoding('ascii');
phonetic.attach();
process.stdout.write('enter a word that sounds like one of these, "' + sentence +'": ');

words = sentence.tokenizeAndPhoneticize();

function findMatch(input) {
    inputSounds = input.phonetics();
    console.log(inputSounds);
    
    for(var i = 0; i < words.length; i++) {
	wordSounds = words[i];

*/

var doubleMetaphone;

doubleMetaphone = require('./');

/*
 * Optional dependencies.
 */

var natural,
    doublemetaphone,
    exception;

try {
    natural = require('natural').DoubleMetaphone;
    natural = natural.process.bind(natural);
} catch (error) {
    exception = error;
}

try {
    doublemetaphone = new (require('doublemetaphone'))();
    doublemetaphone.setMaxCodeLen(Infinity);
    doublemetaphone = doublemetaphone.doubleMetaphone.bind(doublemetaphone);
} catch (error) {
    exception = error;
}

if (exception) {
    console.log(
        '\u001B[0;31m' +