Проблема в регулярном?

package com.javarush.task.task19.task1907;

/*
Считаем слово
*/

import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        FileReader fr = new FileReader(reader.readLine());

        String str = fr.toString().toLowerCase();
        int count = 0;

        while (fr.ready()) {
            Pattern pattern = Pattern.compile("(\\w*)world(\\w*)");
            Matcher matcher = pattern.matcher(str);
            while (matcher.find()) {
                count++;
            }

            reader.close();
            fr.close();
            System.out.println(count);
        }

    }

}