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: ['4423', '8295', 'h', '4881', 'j', 'c', '1185', 'z', 'm', '2725', 'p', '9187', '6275', '1617', '2523', '9879', '4149', '2197', '3909', '5155', '691', 'r', 'e', 'u', 'l', 'd', '1581', '2763', 'c']
Example Output: c, d, e, h, j, l, m, p, r, u, z

Example Input: ['r', 'y', 'c', '3211', '9245', '8459', '8521', '5781', 'w', 's', 'd', '5299', 'a', 'y', 'g', 'm', '6435', '8605', 'e', 'h', '6871', 's', '387', 'l', '5829', 'e', 'd', '9545', '2945', 'k', 'v', 't', '8449', '2199', 'm', '2599', '1489', '6623', 'x', 'l']
Example Output: a, c, d, e, g, h, k, l, m, r, s, t, v, w, x, y

Example Input: ['w', '8175', 's', 'l', 'a', 'f', 'o', '2147', '9489', 'p', '775', 'i', '7113', '7769', 's', '5029', '2283', 'm', 'v', '8951', '9565', '3665', 'x', '7265', 'i', '2139', '6435', '5477', 'm', '1889', 'l', '3747', 't', '4099', 'g', 'n', '3229', '233', '1871', 'o', 'h']
Example Output:
a, f, g, h, i, l, m, n, o, p, s, t, v, w, x