In my case, since I am using the microSD Card HAT, I downloaded the Firmware for Pico with SD Card Hat (208K + VGA Resolution) directly from the PicoMicroMac UF2 Creator page.
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neat, right? and this is just the tip of the iceberg. there are so many more use cases where these operators shine, and i encourage you to play around with them in the web app and see what you can come up with. you can also see the resulting automaton for each regex, and how the different components contribute to the state machine (msagl helped me a lot here).