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.

['e', '2239', 'l', '8309', 'i', '2613', 'i', '611', '6481', 'j', 'v', '1867', '415', '269', '8053', '3369', 'q', 't', '2303', '7729', '1059', '6135', '3299', 'd', '6855', '207', '6227', '7859']
d, e, i, j, l, q, t, v

['7997', 'm']
m

['2671', 'p', 'h', '7219', '627', 'l', 'f', '6053', 't', 'b', '675', 'm', 'y', '7571', 'h', '969', 'f', 'f', '5791', 'n', 'e', 'd', '9703', '4311', '9427', 'e', 'u', '1543', '463', '9163', '4171', 'p']

b, d, e, f, h, l, m, n, p, t, u, y