192 168 43 11293 swiftlock laminate flooring �� b d 1 e x derivative
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x dy dx e x y 0 y 0 1
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d x
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d c
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d z
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d v
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d e
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d t
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d g
192 168 43 11293 swiftlock laminate flooring �� b d 1 e x d y