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: ['2633', 'd', 'r', '8083', 'f', 'd', '5121', '8651', 'o', 'b', '811', '7551', 'x', 'p', 'm', 'v', 'm', '7833', '1959', 'y', 'p', '779', '1889']
Example Output: b, d, f, m, o, p, r, v, x, y

Example Input: ['v', '2989', 'z', '7843', 'e', '9923', 'y', 'b', '7611', 'u', 'u', '6227', '3145', 'w', '6451', 'g', '3129', 'o', 'r', 'z', '8349', 'u', 'h', 'd', 'g', 'a']
Example Output: a, b, d, e, g, h, o, r, u, v, w, y, z

Example Input: ['v', 'j', '8943', '3713', 'w', 'z', '8139', 'p', 'j', 'j', '9171', '5537', '5873', '8271', '8569', '3213', 'e', '5935', 't', 'b', 'z', '8487', 'o']
Example Output:
b, e, j, o, p, t, v, w, z