import itertools

digits = ['4','6','7','8','9']

def even(number):
    return number[-1] in ['0','2','4','6','8']

def threedigitnumbers(digits):
    return list(itertools.permutations(digits, 3))

numbers = [''.join(number) for number in threedigitnumbers(digits) if even(number)]
print len(numbers)
print numbers