Naive String

import java.util.*;
class Naive_string{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the first string");
        String a = sc.nextLine();
        int l1 = a.length();
        System.out.println("Enter the second string");
        String b = sc.nextLine();
        int l2 = b.length();
        int y = 0;
        for(int x = 0; x<=l1-l2; x++){
            for(y = 0; y< l2; y++){
                if (a.charAt(x + y) != b.charAt(y))
                    break;
            }
            if (y == l2){
                System.out.println("Shift at "+ x);
            }
        }


    }
}