from itertools import product

count = 0

for i in product("01x3x5x7x9xBxDEF", repeat = 4):

s = ''.join(i)

if s.count("E") == 1 and s[0] != "0":

if "Ex" not in s and "xE" not in s and "0E" not in s and "E0" not in s:

count += 1

print(count)