If I remember correctly, there's one action where the command must be symmetrical, and another one that has to have 4 of the same symbol and one different one, right? I got something like this: "&&*&&" and that could fit into both, and it ended up being the symmetrical one. Although I might be misremembering a little. Also, this was the only instance where anything like this happened that I noticed, so the whole system is mostly watertight! Writing this up makes me tempted to play the whole game again lol