Given the common pattern: "danlwd fylm" = "american film" when using (each letter replaced by the key to its left). Example: a (left of a is nothing) — actually, better to see: "american" typed with hands shifted one key left yields "danlwd"? Try: a→d? No, a's left is caps lock. So maybe it's right shift to encode, left to decode.

Given the time, the most informative answer:

Let’s decode "danlwd" left-shift: d (left = s) a (left = ‘) — fails. So it's not consistent.

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