[Java Basics][Collections-HW] 07. Count Substr Occurrences

import java.util.Scanner;

public class CountSubstringOccurrences {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String input = sc.nextLine().toLowerCase();
        String word = sc.nextLine().toLowerCase();

        int count = 0;
            int index = 0;
              while ((index = input.indexOf(word, index)) != -1) {
              count++;
              index++;
            }
            System.out.println(count);
    }
}