The lengths of the three sides of a triangle are whole centimeters, the two shorter sides are 5 cm and 8 cm respectively, and the length of the third side should not be less than how many centimeters.
一个三角形三条边的长度都是整厘米数，其中两条较短的边分别是5厘米和8厘米，第三条边的长度应该不小于多少厘米．
<result>4</result>