#epp "PComp"

class TestPComp {
  public static void main(String[] argv){
    int w = 0, x = 0, y = 1, z = 2;
    System.out.println(w <= x);			// (0 <= 0)
    System.out.println(w <= x < y);		// (0 <= 0 < 1)
    System.out.println(w <= x < y < z);		// (0 <= 0 < 1 < 2)
    System.out.println(w <= x++ < y < z);	// (0 <= 0 < 1 < 2)
    System.out.println(! (w <= x < y < z));	// (0 <= 1 < 1 < 2)
  }
}