=+8. Let LZ be a finite set of strings accepted by the finite-state automaton AZ = (QZ, X, f2, AZ , s2 ), i = 1, 2. Let A = (Qi x Q2, X,

f, A, s), where f((qi, q2), x) = (fi(gi, x), f2(g2, x)),

= {(qi, q2) I qi E A 1 and q2 E ,A2}, s = (81,82) .