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: ['e', 'c', '4241', '2685', 'o', '9859', 'z', '2647', 'b', 'c', 'y', '1985', '5985', '5709', '6655', 'q', 'z', '9933', '6817', '6477', '1837', 'x', 'p', '9251', '3787', 'v', '5741', 'e', 'p', '493', '5949', '5519', 'v', 'g', '1403', 'z', 'h', 'z']

A: b, c, e, g, h, o, p, q, v, x, y, z
****
Q: ['w', '9437', 's', '9819', 'q', 'q', '4443', 'p', '377', '6777', 's', 'x', 'a', 'o', '9205', '9289', '7103', 'k', 'l', '9453', '9043', 'k', 'r', 'g']

A: a, g, k, l, o, p, q, r, s, w, x
****
Q: ['u', 'y', 'n', '4261', '849', '339', 'w', '8663', '8215', '1757', '8327', 'm', '1387', '5263', 'f', '9227', '1095', '1779', 'y', 'k', '2201', 'h', 'b', '1759', 'u', '9993', 'c', 'm', 'l', '5469', '1959']

A:
b, c, f, h, k, l, m, n, u, w, y
****