tcdkb scdk rcdkbw qcdkb pcdk
4lck 3lckbw 2lckb 1lck 0lckbw
fvbkbw evbkb dvbk cvbkbw bvbkb
q4akb p4ak o4akbw n4akb m4ak
1dak 0dakbw zdakb ydak xdakbw