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.

['3275', '1279', 'w', 'n', 'p', 'x', '119', 'e', 'v', '4863', '2317', '5357', '6423', '1035', 'd', '9303', 'c', '5329', 'j', '665', '3737', '9843', '8539', 'x', '1851', '6003', '2077', 'q', 'x', 't', '3339']
c, d, e, j, n, p, q, t, v, w, x