package Recursion_Sorting_and_Searching;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Vectors {
    public static void main(String[] args) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int[] arr = new int[9];
        Generate(0,arr);

    }

    private static void Generate(int index, int[] arr) {
        if (index == arr.length) {
            System.out.println(String.join(", ", Arrays.toString(arr)));
        } else {
            for (int i = 0; i <= 9; i++) {
                arr[index] = i;
                Generate(index + 1,arr);
            }
        }
    }
}