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.

['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, c, d, g, h, i, j, m, n, o, p, q, r, s, t, u, x, z

['5011', 'l', '925', 'e', 'b', '3077', 'm', '4541', '781']
b, e, l, m

['h', 'n', 'g', '321', '7111', 'm', 'r', 'c', '2765', 'l', '8435', '5237', '5165', '2079', 'l', '4189', 'r', 'l', 'm', '6645', '4863', 'w', 'h', 'p', 'n', '3361', '8653', 'c', '2787', '8269', 'i', '6893', '7669', '3701', 'w', '2623']

c, g, h, i, l, m, n, p, r, w