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: ['v', 'd', '3805', '8031', '3327', 'c', 'n', '6153', '2705', 'w', '5675', '6543', 'm', 'v', 'y', 'd', '2943', '4423', '515', '4501', 'y', '9377', 'j', 'i', 'f', '4749', 'o', 'r', '2605', 'm', '117', 'o', '9197', 't', 'l', '4145']
Example Output: c, d, f, i, j, l, m, n, o, r, t, v, w, y

Example Input: ['1367', 'h', '4153', '1587', 'h', 'b', 'n', 'u', 'n']
Example Output: b, h, n, u

Example Input: ['609', 'l', 'i', '6799', '5535', '1443', '6949', 'h', 'j', 'c', 'g']
Example Output:
c, g, h, i, j, l