※ 다음 글의 내용과 일치하지 않는 것을 고르시오. [문 13～문 15] Traditional Korean houses can be structured into an inner wing (anchae) and an outer wing (sarangchae). The individual layout largely depends on the region and the wealth of the family. Whereas aristocrats used the outer wing for receptions, poor people kept cattle in the sarangchae. The wealthier a family, the larger the house. However, it was forbidden to any family except for a king to have a residence of more than 99kan. A kanis the distance between two pillars used in traditional houses. The inner wing consisted of a living room, a kitchen and a wooden -floored central hall. More rooms may be attached to this. Poor farmers would not have any outer wing. Floor heating (ondol) has been used in Korea for centuries. The main building materials are wood, clay, tile, stone and thatch. Because wood and clay were the most common materials used in the past, not many old buildings have survived into present times.