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.

Example Input: ['l', '7111', 'd', 'e', 'h', 'z', 'x', '5673', 'v', '8255', 'i', 'z', 'c', 'i', '4287', 'q', '9293', '9137', 'p', 'n', 'o', 'n', '7883', '6453', '7355', '8769', 'y', '9153']
Example Output: c, d, e, h, i, l, n, o, p, q, v, x, y, z

Example Input: ['1063', 'f', 'm', 'i', 'x', 'i', 'd']
Example Output: d, f, i, m, x

Example Input: ['2487', 'l', 's', 'a', '9749', '331', 'l', '9231', 'm', '6125', '5011', '3425', 'w', '9847', '4241', 'l', '6093', '9921', 'r', 'd', 'm', 'r', '6269', '2417', '8235']
Example Output:
a, d, l, m, r, s, w