1 d1 = [2,4,6,8]

     2 d0 = [0,2,4,6,8]

     3 dq = [0, 4, 6]

     4 

     5 for a in d1:

     6     th = a * 1000

     7     for b in d0:

     8         hu = b * 100

     9         for c in d0:

    10             te = c * 10

    11             for u in dq:

    12                 n = th + hu + te + u

    13                 if is_square(n): print n

    14 

    15 

    16 for i in range(46, 94, 2):

    17     n = i * i

    18     if all_even( n ): print n

    19