public class Driver2
{
	public static void main(String[] asd)
	{
		String s = "abcdefg";
		int len = s.length();
		Queue q = new Queue();
		char ch;
		for(int j =0; j < len; j++)
		{
			ch = s.charAt(j);
			q.addNode( new Character(ch) );
		}
		while( !q.isEmpty() )
		{
			System.out.println(q.remove() );
		}
		System.out.println();
	}
}