ay1r by1rb cy1rbg dy1r ey1rb

zo2rb 0o2rbg 1o2r 2o2rb 3o2rbg

of3rbg pf3r qf3rb rf3rbg sf3r

d63r e63rb f63rbg g63r h63rb

2w4rb 3w4rbg 4w4r 5w4rb 6w4rbg