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: ['g', '4165', 'n', 'w', 'n', 'e']

A: e, g, n, w
****
Q: ['o', '1217', '449', 'n', 'e', 'o', 't', '9043', '1925', '5687', '7197', '7943', 'u', '5053', 'q', 'e', '89', 'l', 'h', '3083', '4295', 'o', 'n', '6309', '743', 'n', 'j', '2105', 's', '6845', 'p', 'p', '1355', '3757', 'v', 'f', '961', '4623', '4633', 'p', '4593', 'p', '7337', 'o', 'u']

A: e, f, h, j, l, n, o, p, q, s, t, u, v
****
Q: ['7937', 't', 'o', '7967', 'n', '3999', 'f', 'z', '9269', 'h', 'p', '9313', '293', 't', '567', 'i', 'z', 'e', 's', '6693', '2655', 'p', '399', '2331', 'g', '383', 'k', '8199', '681', '1875', '4837', 'p', 'm', 'w', '217', '5353', '8297', 'z', '4219']

A:
e, f, g, h, i, k, m, n, o, p, s, t, w, z
****