Sorry to keep emailing this: the first one doesn’t work on Google Groups’ web interface, the second one doesn’t work on iOS’s Outlook (Did I mention I hate Google Groups?).

Last attempt: you should see 1 CodeBlock and 4 images:

# base on unicode combination like these
┋❵⇔❴┋ 
┋❵❴┋

If it still doesn’t work, use @jgm’s links

​

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