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: ['8741', 'h', '2147', '373', 'c', 'r', '2639', '3511', '1393', 't', '7173', 'f', '9371', '7659', 'q', '4799', 'f', '1967', '1905', '8783', 'i', 'n', 'z', '6395', 'u', 'i', '1493', '1395', '1909', '477', 'i', '8547', '393', '2203', '6893', 'y', '2085', '6445', '7753', '4027', 'h', 'y', '7963']

A: c, f, h, i, n, q, r, t, u, y, z
****
Q: ['4905', 'w', '3143', '2217', '573', '1073', '63', 'a', '3971', '2887', '3485', 'y', '3893', '1059', '7623', 'x', 'd', '2991', 'e', 's', '735', 'm', 's', '257', 'x', '5559', '97', 'p', '7237', '693', '7229', 'd', '2311', '807', 'd', 'l', '1247', 'l', '359']

A: a, d, e, l, m, p, s, w, x, y
****
Q: ['v', 'w', '8841', '4681', 'q', '9063', '243', 'g', '5885', '1787', 'w', 's', '7697', 'y', 'c', '9895', 'j', 'n', 's', '2449', 'g', '5411', 'a', '8443', '7255', '6193', 'j', '1999', 'u', 'q', '4745', 'l', 'f', 'c', '9067', '1857', '4779', '6643', '1587', '7567', 'z', 't', 'm']

A:
a, c, f, g, j, l, m, n, q, s, t, u, v, w, y, z
****