instruction:
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.
question:
UXNASezUYtYfHkklDNtMhGcbTNKUhy, VpFTDtYfHkklDNtMhGgJhpOVRS
answer:
a, b, c, d, e, f, g, h, k, l, m, n, s, t, u, x, y, z


question:
OajQYHEqm, kEQYHEBsUG
answer:
b, e, g, h, k, q, s, u, y


question:
ioIRZDQNupK, WOZDQNuRMy
answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
d, i, k, n, o, p, q, r, u, z


