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.

['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, b, f, g, k, l, m, n, p, q, r, s, u, v, w, z

['c', '1693', 'l', 'u', 'x', '3609', 'h', '4159']
c, h, l, u, x

['g', '5367', '2637', '3133', 't', 's', 's', '6297', '9859', 'f', '4153', 'z', '8559', 'z', '3827', 'e', 'g', '9795', 'z', '8763', '5937', 'p', '2527', 's', '1251', '3691', 'q', 'p', '6817', 'z', 'r', '6277', 'e', 'c', 'l', 'l', '5367', 'k', 'q']

c, e, f, g, k, l, p, q, r, s, t, z