Xiaohong needs to use three small sticks to form a triangle. The first stick is 12 cm long, the second stick is 6 cm long, and the third stick can choose how long it is in centimeters.
小红要用三根小棒搭成一个三角形，第一根长12厘米，第二根长6厘米，第三根可选择长是多少厘米的小棒．
<result>8</result>