The four points A, B, C, and D are arranged on a straight line from left to right. With these four points as endpoints, six line segments can be formed. It is known that the lengths of these six line segments are 12, 18, 30, and 32 respectively. , 44, 62 (unit: centimeter), then what is the length of line segment BC in centimeters.
A、B、C、D四个点从左向右依次排在一条直线上，以这四个点为端点，可以组成六条线段，已知这六条线段的长度分别是12、18、30、32、44、62(单位：厘米)，那么线段BC的长度是多少厘米．
<result>12</result>