def calc_ord(char):
return ord(char) - ord('A')
def rotate_ord(char, value):
return (calc_ord(char) + value) % 26
S = input()
U_list = [chr(i) for i in range(ord('A'), ord('Z') + 1)]
L = len(S)
H = L // 2
FS = S[:H]
BS = S[H:]
F_N = sum([calc_ord(f) for f in FS])
B_N = sum([calc_ord(b) for b in BS])
F_list = [U_list[rotate_ord(f, F_N)] for f in FS]
B_list = [U_list[rotate_ord(b, B_N)] for b in BS]
DRM_message = []
for F, B in zip(F_list, B_list):
DRM_message.append(U_list[rotate_ord(F, calc_ord(B))])
print(''.join(DRM_message))
