string = input()

a = "A"
b = "B"
c = "C"
d = "D"
e = "E"
f = "F"
g = "G"
h = "H"
i = "I"
j = "J"
k = "K"
l = "L"
m = "M"
n = "N"
o = "O"
p = "P"
q = "Q"
r = "R"
s = "S"
t = "T"
u = "U"
v = "V"
w = "W"
x = "X"
y = "Y"
z = "Z"

alphabet_lst = [
    a,
    b,
    c,
    d,
    e,
    f,
    g,
    h,
    i,
    j,
    k,
    l,
    m,
    n,
    o,
    p,
    q,
    r,
    s,
    t,
    u,
    v,
    w,
    x,
    y,
    z
]

origin = ''

for i, char in enumerate(string):
    cnt_now = i+1

    for j, alphabet in enumerate(alphabet_lst):
        if alphabet == char:
            num_alpha = j
            break
    
    idx = (j - cnt_now)%26
    origin += alphabet_lst[idx]

print(origin)