In this task, you are given two strings A,B. Find the longer of the two lists, convert it to lowercase, and return all the unique alphabets used in it. The two input strings are never equal.
--------
Question: yjwmVhyyhVLlcVKgNrnNWBMtFN, jtUTHltpyhVLlcVKgNrnRchLGEQnuM

Answer: c, e, g, h, j, k, l, m, n, p, q, r, t, u, v, y


Question: qmeXRFTusp, hAcXRFRKJ

Answer: e, f, m, p, q, r, s, t, u, x


Question: gkKEsnQZMdpFNOfplnAKtf, mtwDwKEsnQZMdpFNOfjOwGl

Answer:
d, e, f, g, j, k, l, m, n, o, p, q, s, t, w, z