hey guys ive been trying to make a custom password list but ive been having some problems..
lets suppose in need to make a password list containing only passwords in the format of 3 numbers 2 letters and 3 numbers
i first thought a simple bash script could do it:

for i in a b c d e f
for x in a b c d e f
echo "$i $x"
./crunch 5 5 -f charset.lst numeric -o /home/bunk3r/Desktop/tk1000PASS.txt -t @@@$i$x

now the echo command does print all letters but crunch is not taking the values fromn the for loop, my output shows a list containing only the passwords for the last letter of the list in tis case f......i made a similar script in python and i get the same results any suggestions??