rc_gen.py

import itertools

# set test vars
yy = "1993"
mm = "05"
dd = "19"

# convert yyyy to yy
if len(str(yy)) == 4:
    yy = yy[2:]

# join vars to get date part of RC
rc_a = yy + mm + dd

# set up list for RC results
rc_list = []

# Magic happens here
for i in itertools.product([str(i) for i in xrange(0,10)], repeat=3): # iterate through 000 to 999 as i
    rc = rc_a + (''.join(i))    # join i to the current RC date
    rem = str(int(rc) % 11)     # divide by 11 and get remainder
    if rem == "10":             # if remainder is 10, make it 0
        rem = "0"
    rc = rc + "" + (rem)        # add the remainder to the 9 digit RC
    rc_list.append(rc)          # add that shit to the list
    
print len(rc_list)