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]: ['4045', '4739', 'd', 'e', '6789', 'e', 'q', '4909', '9511', 'h', '9543', '6725', 'a', '3683', 'q', 'k', 'd', 'q', 'z', 'b', '3245', '9877', '9155', '7751', 'e', '1015', '2379', 'f', 'y', '1121', '9801', 'c', 'h', 'l', 'f', '67', 'v', 'v', 'y', 'c', '3871', 'v', '5893', 'a']
[A]: a, b, c, d, e, f, h, k, l, q, v, y, z


[Q]: ['o', 'd', '6495', '5211', '341', 'v', '385', 'v', 'g', 'v', 'l', '7631', '2675', 't']
[A]: d, g, l, o, t, v


[Q]: ['5525', '9535', 'o', 'z', '2039', '469', 'm', 'o', 'a', 'y', 'a', '2693', '4277', 'a', '1763', '5059', 'a', '2589', '2965', '9913', 'p', '9501', '2311']
[A]:
a, m, o, p, y, z