Letters that make piece of writing
o, e, f, g, n, p, c, r, t, i, w are letters that make 'piece of writing'
Words within piece of writing
piece, PI, IT, writ, IE, ti, PIE, ting, pie, EC, pi, ng, RI, CE, ie, in, writing, tin, IN, Ce, In, Ti are words within 'piece of writing'