public class TextProcessor {

    public static String numberOccurrences(String input, String word) {
        int pos = input.indexOf(word);
        int num = 1;

        while (pos != -1) {
            int splitPos = pos + word.length();
            input = input.substring(0, splitPos) + num
                    + input.substring(splitPos);
            num++;

            pos = input.indexOf(word, pos + 1);
        }
        return input;
    }

    public static String numberOccurrencesBad(String input, String word) {
        String result = "";
        int count = 0;
        String[] parts = input.split(" ");

        for (int i = 0; i < parts.length; i++) {
            if (parts[i].equals(word)) {
                count++;
                result += parts[i] + count + " ";
            } else {
                result += parts[i] + " ";
            }
        }

        return result.substring(0, result.length() - 1);
    }

}