,a d a, ,a
h 4a. .aP 4a. b
gggg ggg ggg ggg gggg
:: ::: ,aP 4a, ::
:: ::: h-d-b ::
:: ::: ba,. .,ad ::
:: ::: P.,vrm,.4 ::
ggggggggggggggggggggggggggggggggggggggggg