In this task, you are given an input list A comprising of numbers and alphabets. You need to extract and sort the unique alphabets in the list. The alphabets in the input list will only be in lowercase. Return -1 if there is no alphabet in the input list.

[Q]: ['219', '2065', '4045', 'k', 'n', 's', 'z', '7239', '1043', 'r', '2333', 'q', 'k', 'b', '2013', 'g', '6925', '9835', 'a', '5377', 'k', '8005', 'p', '9753', 'm', '201', '2353', 'f', 'n', '89', 'q', 'p', '7847', 's', 'l', '3359', '2269', 'v', 'm', '8247', '9665', 'u', 'w']
[A]: a, b, f, g, k, l, m, n, p, q, r, s, u, v, w, z


[Q]: ['1653', '3177', 'b', '2785', '2515', 'd', '5513', '5599', '2947', 'v', '2771', '5697', '2913', '4161', '5939', '2655', '6787', '9851', 'q', '3199', 'x', '1305', '9423', '9117', '4821', 'j', '7963', 'i', 's', '469', 'r', 'w']
[A]: b, d, i, j, q, r, s, v, w, x


[Q]: ['i', 'n', '6587', 'm', 'f', '3823', 'd', 'c', 'm', 'p', '8321', 'q', 'x', 'g', 'l', 'd', '7623', '771', 'v', '4513', '5787', 'i', '3525', 'y', '6163', '3043', '3233', 'f', '8251', '1945', '4111', 't', '6157', 'm', '6033']
[A]:
c, d, f, g, i, l, m, n, p, q, t, v, x, y