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]: ['5345', 'f', '6605', 's', 'q', 'w', 'p', 'o', 's', 'u', 'i', '7339', '8379', 'h', '9547', 'b']
[A]: b, f, h, i, o, p, q, s, u, w


[Q]: ['l', '1213', 'm', 'k', '7825', '3501', '2397', '2313', 'v', '4119', 'h', 't', '6137', 'l', '9851', 'q', '9661', 'b', 'z', '1437', '1759', 'l', '611', '5085', '4443', 'n', 'u', 'b', '2511', '6023', '7157', 'n', '9921', 'o', 'a', 'o', 'w', 't', 'o', '1607', '6751', 'n', 'b']
[A]: a, b, h, k, l, m, n, o, q, t, u, v, w, z


[Q]: ['8061', '9191', 'v', '1645', '3333', '9471', 's', '2975', 'g', '2437', 'j', '1771', '1657', 'z', 'c', '9761', '6967', 'o', '7755', '3593', 'u', '6037', '3371', '8885', '9813', '8313', 's', '9073', 'f', 't', '1175', 'm', '863', 'v', '3989', '6149', '8435', 's', '3251', 'z', 'r', '7603', '9021', 'k']
[A]:
c, f, g, j, k, m, o, r, s, t, u, v, z