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Could you please advise on a better cytonization of the following method:
def make_key( items, is_t_or_f ):
codes = ( '', 'a', 'b', 'c', 'd' )
zcodes = ( '', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11' )
zeros = 0
ss = is_t_or_f
for i in range(13):
...