In this task, you are given two strings A,B. Find the longer of the two lists, convert it to lowercase, and return all the unique alphabets used in it. The two input strings are never equal.

Ex Input:
vgvTgXgMRcwMr, EUbApEegXgMRcwqFOah

Ex Output:
a, b, c, e, f, g, h, m, o, p, q, r, u, w, x


Ex Input:
TUreWEq, pHreGH

Ex Output:
e, q, r, t, u, w


Ex Input:
BfuooyRwCWgkypf, XDjjToyRwCWgQujetEN

Ex Output:

c, d, e, g, j, n, o, q, r, t, u, w, x, y