public class Runner1 {

        public static void main(String argv[]) {
                Tag t = new Tag("HTML");
                Tag b = new Tag("BODY");
                t.add(b);

                Tag h = new Tag("H1");
                b.add(h);

                Tag p = new Tag("p");
                b.add(p);
                TextTag a1= new TextTag("alamakota");
                TextTag a2 = new TextTag("hello");

                h.add(a2);
                p.add(a1);
                t.prettyPrint();

        }



}
public class Tag {
        public static final String TAB = "    ";

        private Tag [] children = new Tag[5];
        private int countChildren = 0;

        protected String name;

        public Tag(String name) {
                this.name=name;
        }

        protected String wciecie(int glebokosc) {
                String wciecie="";
                for (int i = 0; i < glebokosc; i++)
                        wciecie+=TAB;
                return wciecie;
        }

        public void add(Tag t) {
                children[countChildren++]=t;
        }

        public void prettyPrint() {
                this.prettyPrint(0);
        }

        public void prettyPrint(int glebokosc) {
                String wciecie = this.wciecie(glebokosc);
                System.out.println(wciecie+"<"+name+">");
                for (int i =0 ; i < countChildren; i++)
                        children[i].prettyPrint(glebokosc+1);
                System.out.println(wciecie+"</"+name+">");
        }


}


public class TextTag extends Tag {
        public TextTag(String name) {
                super(name);
        }

        public void prettyPrint() {
                this.prettyPrint(0);
        }

        public void prettyPrint(int glebokosc) {
                String wciecie = this.wciecie(glebokosc);
                System.out.println(wciecie+name);
        }