The four points A, B, C, and D are arranged on a straight line from left to right. With these four points as endpoints, 6 line segments can be formed. It is known that the lengths of these 6 line segments are 12, 18, and 30 respectively. , 32, 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6条线段，已知这6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>