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: ['c', '4881', '6893', '3729', 'j', '2385', 'q', 'v']
Example Output: c, j, q, v

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: ['f', 'v', 'b', '1479', '3615', 'z', 't', 'k', '4115', '4111', 'i', '555', '3897', 'k', '8251', 'h', 'p', '9195', 'p', '365', 'q', '847', 'm', 'r', 's', 'v', '4417', '175', '301', 'z', '9101', '8911', '1695', '9863']
Example Output:
b, f, h, i, k, m, p, q, r, s, t, v, z