/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.util.stream.IntStream ;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
	int[] a = { 10 , 20 , 30 , 40 } ;
	int[] b = { 50 , 60 , 70 , 80 } ;
	int[] merged = IntStream.concat( IntStream.of(a) , IntStream.of(b) ).toArray() ;
 
	System.out.println( Arrays.toString( merged ) );
 
	}
}

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