What is wrong?

FileReader fr = new FileReader("C:\\Users\\Lenovo\\Desktop\\in.txt");
       BufferedReader br1 = new BufferedReader(fr);
       ArrayList<String> list = new ArrayList<>();
       while(br1.ready()){
           String pp = br1.readLine();
           pp = pp.replaceAll("\\s","");
           String[] ss = pp.split("\\p{Punct}");
           Collections.addAll(list, ss);
       }
       br1.close();
       fr.close();

       int num=0;

       for(int i = 0; i<list.size(); i++){
           if(list.get(i).equals("world")){
               num++;
           }
       }
       System.out.println(num);

public class Probna {
    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        String d = "!World, world, world, World?";
        d = d.replaceAll("\\s","");
        String [] str = d.split("\\p{Punct}");

        Collections.addAll(list, str);
        int num = 0;
        for (String as:
             str) {
            System.out.println(as);
            if(as.equals("world")){

                num++;
                System.out.println(num);
            }
        }

    }
}

output test:
World
world
1
world
2
World

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String a = br.readLine();
        br.close();
        FileReader fr = new FileReader(a);
        BufferedReader br1 = new BufferedReader(fr);
        ArrayList<String> list = new ArrayList<>();
        while(br1.ready()){
            String pp = br1.readLine();
            pp = pp.replaceAll("\\s","");
            String[] ss = pp.split("\\p{Punct}");
            Collections.addAll(list, ss);
        }
        br1.close();
        fr.close();

        int num=0;

        for(int i = 0; i<list.size(); i++){
            if(list.get(i).equalsIgnoreCase("world")){
                num++;
            }
        }
        System.out.println(num);

    }
}