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:
ayMQQRSyKAcGcamGV, GOyWvyWcgMQQRSyKAcGcaYlIfAAhPoe

Ex Output:
a, c, e, f, g, h, i, k, l, m, o, p, q, r, s, v, w, y


Ex Input:
falHsspAHSiE, FTJblHsspsC

Ex Output:
a, e, f, h, i, l, p, s


Ex Input:
MVqLUOeTIRNMk, viqLUOeTjcQU

Ex Output:

e, i, k, l, m, n, o, q, r, t, u, v