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Variant that doesn't rely on potentially undefined behavior of asking "repeat" to repeat before the beginning:

cHJpbnQgMApwcmludCAyCnByaW50IDAKcHJpbnQgMgpwcmludCAwCnJlcGVhdCAzIDIKcHJpbnQgMgpyZXBlYXQgMyAyCnByaW50IDIKcmVwZWF0IDMgMgo=

Good eye.

Sure, but LZ doesn't necessarily allow that.

How do you use these strings?

They're base64. Feed them to "base64 -d" on Linux, or one of the many base64 decoders on the web. See https://en.wikipedia.org/wiki/Base64