Write and solve an equation to solve the problem. Lisa is 4 centimeters taller than her friend lan. lan is 8 centimeters taller than Jim. Every month, their heights increase by 2 centimeters. In 4 months, the sum of lan's and Jim's heights will be 170 centimeters more than Lisa's height. How tall is lan now? Let h be lan's height today in centimeters.

(h+8)( )+8=( )+8+170

Ian is ___ centimeters tall now.