/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	enum A {
		X(B.Z);
 
		A(B b) {
			System.out.println("Constructing " + name() + ": " + b);
		}
	}
 
	enum B {
		Z(A.X);
 
		B(A a) {
			System.out.println("Constructing " + name() + ": " + a);
		}
	}
 
	public static void main (String[] args) throws java.lang.Exception
	{
		for (A a : A.values()) System.out.println(a);
		for (B b : B.values()) System.out.println(b);
	}
}

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