public String toString(){
			String line="";
			
			line = this.left;
			
			line+=" -> ";
			int ct =0;
			for( String s: right){
				if( ct == dot){
					line += ".";
				}
				line+=s+" ";
				ct++;
			}
			if( ct == dot){
				line += ".";
			}
			return line;
		}