rcd4by scd4 tcd4b ucd4by vcd4

g3d4 h3d4b i3d4by j3d4 k3d4b

5te4b 6te4by 7te4 8te4b 9te4by

ukf4by vkf4 wkf4b xkf4by ykf4

jbg4 kbg4b lbg4by mbg4 nbg4b