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]: ['t', 'c', 'r', '4459', 'o', '1407', 'x', '1515', '331', 'm', '1535', 'p', 'u', 'g', '2513', 'o', '7827', '8149', 'd', 'z', 'q', '5655', 'x', '9997', '2809', 'g', 'h', '6309', 'a', 'j', '9773', '2115', 't', '9113', 'q', 'o', '427', 's', '3815', '5423', 's', 'n', 'i', 'o', '3643']
[A]: a, c, d, g, h, i, j, m, n, o, p, q, r, s, t, u, x, z


[Q]: ['9555', '5983', '1853', 'c', 'z', 't', 'p', '9041', 'd', '5919', '1621', '345', 's', '2647', '4261', '8611', 'w', 'x', 'p', '9103', '2599', '5101', '9261', 'k', '7437']
[A]: c, d, k, p, s, t, w, x, z


[Q]: ['i', '1181', '9955', '7247', '3203', 'o', '6019', 'd', 'a', 'c', '6815', 'x', 'm', '8403', '6327', 'h', '5033', 'v', 'v', 'z', 'c', 'z', '4549']
[A]:
a, c, d, h, i, m, o, v, x, z