t = input("Text: ")
s = int(input("Shift: "))
e = ""
for c in t:
    if c.isalpha():
        e += chr((ord(c.lower()) - 97 + s) % 26 + 97)
    else:
        e += c
print("Enc:", e)

d = ""
for c in e:
    if c.isalpha():
        d += chr((ord(c.lower()) - 97 - s) % 26 + 97)
    else:
        d += c
print("Dec:", d)