3 ms·

I know shell can expand, but this is my first time seeing somethings like this. I didn't know shell can do things like Cartesian product before.

• aidenn0 6y ago
  That's a bashism, fwiw
• jeffbarr 6y ago
  This was in the BSD C Shell (https://en.wikipedia.org/wiki/C_shell https://en.wikipedia.org/wiki/C_shell) way back in the early 1980s!