import java.lang.System;

import java.io.*;

public class ws {
   
   public static void add() {
      currentIndent += step;
   }
   public static void sub() {
      currentIndent -= step;
   }
   
   public static void set( PrintWriter out ) {
      ws.out = out;
      currentIndent = 0;
   }
   
   public static void set( int indent ) {
      currentIndent = indent;
   }
   
   public static void print( String s ) {
      out.print( space.substring(0, currentIndent) );
      out.print(s);
   }
   
   public static void println( String s ) {
      out.print( space.substring(0, currentIndent) );
      out.println(s);
   }
   
   static int currentIndent = 0;
   /* there is a Java and a Green mode. 
      indent in Java mode:
      3 6 9 12 15 ...
      indent in Green mode:
      3 6 9 12 15 ...
   */
   static public final int green = 0, java = 1;
   static int mode = green; 
   public static int step = 3;
   static public PrintWriter out;
         
   
   static final private String space = "                                                                                                        ";

}