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.

['z', 'l', 's', 'f', 'j', 'x', '1125', 'd', '37', '5009', '9187', 'b', '8683', '8841', 'y', '9955', '1571', 'm', '347', '3679', '5797', '2133', 'g', 'u', '9817', '6347', '2067', '1927', '167', '4215', '45', 't', 'd', '6599', '4751', 'g', 'l', 'u', '7881', 's']
b, d, f, g, j, l, m, s, t, u, x, y, z

['163', 'x', 'g', '5997', 'm', 'l', '7225', '7907', '375', 'y', 'a', 'j', 'c', 'j', '7755', '147', 'h', '3845', 'y', 's', 'h', 'u', '8737', '6091', 'j', 'f', 'c', '7395', '881', '1771', 'y', '3691', 'h']
a, c, f, g, h, j, l, m, s, u, x, y

['3995', '7523', 'x', 'c', 'f', 'd', 's', 'm', 'g', 'g', 'r', 'v', 'j', 'u', 'o', 'r', 't', '2947', 'g', 'm', 'v', '6611', '6145', '3177', 't', '1067', '2461', '3379']

c, d, f, g, j, m, o, r, s, t, u, v, x