Demo

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Demo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] input  = scanner.nextLine().split("\\|");

        for (int i = 0; i < input.length; i++) {

            if (!input[i].trim().isEmpty()) {
                input[i] = input[i].replaceAll("\\s+", " ");
            }

        }
        List<String> nums = new ArrayList<>();

        for (int i = input.length - 1; i >= 0 ; i--) {

            nums.add(input[i].trim());

        }

        for (String num : nums) {

            System.out.print(num + " " );

        }
    }
}