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: ['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']

Output: c, d, e, h, j, l, m, p, r, u, z


Input: Consider Input: ['w', 'o', 'l', '5331', 'k', '9325', '6759', '7931', '8185', 'w', 'h', 'h', 'x', '4357', '6845', 'v', 'o', '8401', 'u', 'g', 'f', 'j', 'j', '2493', '4753', 'c', 'm', '1469', '4307', 'm', '2737', 'n', 'y']

Output: c, f, g, h, j, k, l, m, n, o, u, v, w, x, y


Input: Consider Input: ['g', '2789', 'r', '4519', 'j', 'q', '5047', '5757', '8535', '9453', '5785', 'j', 'f', '9903', 'l', 'r']


Output: f, g, j, l, q, r