from base64 import b64encode, b64decode

k = '1de76ec9fc46fab7'

def modchar(c, i):
    return chr((((((ord(c) - 32) + i) % 94) + 94) % 94) + 32)

def decode(s):
    global k
    r = ''
    n = 0
    for i in range(len(s)):
        r += modchar(s[i], -(int(i * 1.3) + i + len(s) - ord(k[n % len(k)]) + 109))
        n += 1
    return b64decode(r)

def encode(s):
    global k
    r = ''
    n = 0
    s = b64encode(s)
    for i in range(len(s)):
        r += modchar(s[i], (int(i * 1.3) + i + len(s) - ord(k[n % len(k)]) + 109))
        n += 1
    return r


print decode("/cUY")
print encode('110')