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: ['o', '4169', 'k', '7349', 'w', 't', '8271', '8781', '3725', '2865', '6053', 'j', 'z', '4211', '8231', '213', '6389', 'f', 'h', 'g', '9269', '4617', '4137', 'i', 'y', 'i', 'n', '4597', 'p', 'z', '3195', '3231', 'c', '1901', '1231', 'p', '4509', '2557', '3715']

A: c, f, g, h, i, j, k, n, o, p, t, w, y, z
****
Q: ['5433', '4011', '2113', '2299', 'e', '9829', 'd', 'q', 'e', '3921', 'a', 'q', '8953', 'q', 'g', 'w', 'z', 'u', '4425', 'b', 'q', '5315', 'b', 'u', 'h', 'y', '9733', 'b', 'c', '1225', 'a']

A: a, b, c, d, e, g, h, q, u, w, y, z
****
Q: ['v', '3795', '7953', '1611', '7937', '4587', 'l', 'p', 'o', '6473', 'g', '8051', '8063', '9027', 'v', 'u', '8597', 'q', 'y', 'm', 'j', 'g', 'q', '2675', 'c', '4851', '9483', '1183', '6935']

A:
c, g, j, l, m, o, p, q, u, v, y
****