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: ['5181', '8651', '963', '2111', 'g', '7913', '8335', 'o', '1387', '9225', '6517', 's', 'r', '2291', '3699', 'y', 'y', '4223', 'i', '9109', 'm', 's', '8585', 'l']

Output: g, i, l, m, o, r, s, y


Input: Consider Input: ['h', 'g', '4563', 'v', 'm', '107']

Output: g, h, m, v


Input: Consider Input: ['v', 'h', '5669', 'k', '7043', '3329', '7205', '2261', '2593', '5901', 'o', '5961', '2057', 'g', 's', 'f', 'b', '4299', '5459', 'm', '7807', 'n', 'k', '7947', '749', 'p', 'h', 'c', 'j', '7461', '8615', '2397', '7599', '6577', '9473', 'e', '6141', '8585', 'e', 'f']


Output: b, c, e, f, g, h, j, k, m, n, o, p, s, v