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', '6867', '7965', '3313', 'k', '1827', '7337', 'u', '1209', '5145', 'w', 'h', '9059', 'u', 'b', '3189', '2837', 'k', 'y', 'e', 'b', '4479', '541', '7103', 'h', 'm', '2177', '6377', '3993', '7167', 'q', '2145', '5007', '9135', '5331', 'e']
[A]: b, e, g, h, k, m, q, u, w, y


[Q]: ['565', 'i', '615', '3047', 'm', '195', '7547', '3003', '9213', '9063', 'c', '5099', 'v', '5003', '9053']
[A]: c, i, m, v


[Q]: ['c', 'p', '5663', 'g', '4747', '3715', 'n', '7517', 'b', 't', '9203', 'c', '8357', '5951', '1983', '9799', '573', '9385', 'm', 'p', '4057', 'v', 'k', 'x', '85', '1817', '5699', '5199', 'e', '5347', '779', 'h', '9087', 'i', 'j', '487', '1189', 'v', '361']
[A]:
b, c, e, g, h, i, j, k, m, n, p, t, v, x