I agree with penguinkeeper, doing this in a small Python script that for example, recursively goes over the list of list of 4 characters, would do the trick. If you are persistent you want to do it in hashcat, it is actually not that hard at al. Probably even faster than in Python
For each of those lines of 4 characters, put them in a file, e.g. 1.txt, 2.txt ....12.txt with each of the characters on a single line
Then simply use a combinator attack repeatedly to build your output dictionay:
./hashcat.exe -a1.txt 2.txt --stdout > 12.txt
./hashcat.exe -a1 12.txt 3.txt > 123.txt
./hashcat.exe a1 123.txt 4.txt > 1234.txt
...
You get the point, very easy!
For each of those lines of 4 characters, put them in a file, e.g. 1.txt, 2.txt ....12.txt with each of the characters on a single line
Then simply use a combinator attack repeatedly to build your output dictionay:
./hashcat.exe -a1.txt 2.txt --stdout > 12.txt
./hashcat.exe -a1 12.txt 3.txt > 123.txt
./hashcat.exe a1 123.txt 4.txt > 1234.txt
...
You get the point, very easy!