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: ['o', '1217', '449', 'n', 'e', 'o', 't', '9043', '1925', '5687', '7197', '7943', 'u', '5053', 'q', 'e', '89', 'l', 'h', '3083', '4295', 'o', 'n', '6309', '743', 'n', 'j', '2105', 's', '6845', 'p', 'p', '1355', '3757', 'v', 'f', '961', '4623', '4633', 'p', '4593', 'p', '7337', 'o', 'u']

Output: e, f, h, j, l, n, o, p, q, s, t, u, v


Input: Consider Input: ['f', '3409', 'i', '4147', '1745', '6007', 'l', 'd', 'i']

Output: d, f, i, l


Input: Consider Input: ['1863', 'q', '6199', 'n', '2715', 'k', '1627', '1405', 'o', 'n', '3223', '8057', 'z', '1259', 'p', '5887', 'v', '4541', '2135', '4117', '2429', '235', '7539', 'b', '4865', '7887', 'q', '1471', '9597', 'l', '3405', 'n', 'o', '5975', '8155', '4011', 'c', '8525', 'i', '8795', 'o', 'v', 'p']


Output: b, c, i, k, l, n, o, p, q, v, z