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.

Input: Consider Input: ['d', 'p', 'q', '5319', 'w', '4887', '6695', 't', '7711', 'l', '7597', 's', 'n', '1461', 'e', '9045', '1307', 'j']

Output: d, e, j, l, n, p, q, s, t, w


Input: Consider Input: ['1429', '7763', '9737', 'l', '1865', 's', '9871', 'e', 'c', 'q', '2727', 'v', 'p', 'd', 'p', '6771', 'c', '7051', 'e', 'b', 'd', 'o', '7427', 'x', 'e', 'm', 'u', '4887', '1649', 'u', 'h', '5249', 'e', '7579', '8549']

Output: b, c, d, e, h, l, m, o, p, q, s, u, v, x


Input: Consider Input: ['s', 'n', 'x', 'n', '6801', '1383', 'g', 'x', '5559', '2915', 'r', '935', '239', '5285', '3283']


Output: g, n, r, s, x