import sys,binascii
s = sys.stdin.read()
l = [binascii.crc32(s.encode("utf-8"))&1]
x = "123456"
for i in range(1,7):
    l.append(binascii.crc32((s + x[:i]).encode("utf-8"))&1)
a = ''.join(map(str,l))
ans = ""
if a == "0010000" : ans = "Alice"
if a == "0101100" : ans = "Bob"
if a == "0101010" : ans = "Alice"
if a == "1110001" : ans = "Bob"
if a == "1000100" : ans = "Bob"
if a == "0100000" : ans = "Bob"
if a == "0000110" : ans = "Bob"
if a == "0001000" : ans = "Bob"
if a == "0100001" : ans = "Alice" 
if a == "1001000" : ans = "Bob"
if a == "1010011" : ans = "Bob"
if a == "0011010" : ans = "Bob"
if a == "1100010" : ans = "Alice"
if a == "0111111" : ans = "Bob"
if a == "1101100" : ans = "Alice"
if a == "1111101" : ans = "Alice"
if a == "0010101" : ans = "Alice"
if a == "0001001" : ans = "Bob"
if a == "0101110" : ans = "Bob"
if a == "0010001" : ans = "Bob"
if a == "1001101" : ans = "Bob"
if a == "0001111" : ans = "Alice"
if a == "0011001" : ans = "Alice"
print(ans)