2. Eu This is instrument consists of a crouching wooden tiger which has a row of 27 teeth on its back and a brush made of nine split bamboo sticks. While Tchouk is used to begin the orchestra, Eu is used to stop it. A man beats the tiger on the head three times with one end of the brush and runs the brush along the teeth once. The three beats followed by one brushing are repeated three times before the orchestra stops to play. Together with its counterpart, Tchouk, Eu is introduced into this country during the Koryo period and is still used during ritual ceremonies at the Confucian Temple.