Hybrid attack, alternating between modified and unmodified passwords

[brtlmj]

I would like hashcat to use a wordlist and use each word twice: first "as is", and then with a "1" appended to it.
Looks like the "hybrid attack" should be able to do it. I can even see an example what to do if I wanted to append different digits here: https://hashcat.net/wiki/doku.php?id=hybrid_attack
But how do I make it alternate between appending something and nothing?

Thanks!