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]: ['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]: ['4397', '2685', '9539', '4343', '6697', '7693', 'g', 'c', '3587', '4691', 'j', '8931', '7397', '2103', '3431', 'u', 'l', 's', 'v', 'q', 'd', '1289', 'h', '1695', 'h', 'j', 'e', '1225', 'e', '7893', 'o', 'i', '3351']
[A]: c, d, e, g, h, i, j, l, o, q, s, u, v


[Q]: ['6905', '1161', '7387', '89', 'h', 'k', 'p', '5397', 'd', 'e', 'm', '7311', '7619', 'o', 'f', 'i', '6857', '7333', '4131', '3803', 'm', 'y', '9345', '9577', 'k', '7735', 'j', '3685', 'u', '1755', '7547', 'w', '2297']
[A]:
d, e, f, h, i, j, k, m, o, p, u, w, y