a7mr b7mr6 c7mr6f d7mr e7mr6
zxnr6 0xnr6f 1xnr 2xnr6 3xnr6f
ooor6f poor qoor6 roor6f soor
dfpr efpr6 ffpr6f gfpr hfpr6
25pr6 35pr6f 45pr 55pr6 65pr6f