using System;
using System.Linq;

class Program
{
    static void Main()
    {
        // Input arrays
        int[] array1 = { 8, 2, 6, 4 };
        int[] array2 = { 9, 1, 5, 3, 7 };

        // Union of both arrays (removing duplicates)
        var unionArray = array1.Union(array2).ToArray();

        // Sort the result in ascending order
        Array.Sort(unionArray);

        // Output the result
        Console.WriteLine(string.Join(" ", unionArray));
    }
}