ÀÌ·±°ÍÀ» µéÀ¸¼Ì³ª¿ä http://www.youtube.com/watch?v=eMfnTixjFEQ&feature=player_embedded http://www.youtube.com/watch?v=nTxzRSQAdI0&feature=player_embedded http://www.youtube.com/watch?v=gJp4QZsk-Ow&feature=player_embedded