Letters that make black-marked
a, b, d, e, k, l, c, m, r are letters that make 'black-marked'
Words within black-marked
mar, Mark, MA, la, ma, AC, ar, lack, mA, ED, black, marked, mark, ark, Ark, AR, LA, Black, Ac, Ar, La, lac, Mar are words within 'black-marked'