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', 'z', '5199', 'x']

A: e, x, z
****
Q: ['1487', '8003', 'd', '7237', 'l', 'y', '2749', 'e', '9685', '2825', 'z', '7743', 'r', '9617', 'w', '4323', '2173', '8419', '2831', '8923', 'l', '2985', '303', 'y', '9409', 'i', 'h', 'e']

A: d, e, h, i, l, r, w, y, z
****
Q: ['1365', 'l', '9849', 'q', '803', '7363', '8079', '8633', 'h', '2545', '9899', 'p', '9171', 'y', '3351', 'i', 's', 'i']

A:
h, i, l, p, q, s, y
****