Maybe it’s a instead? Let’s try right shift (each letter replaced by key to the right):
Take “thmyl” — if the coder meant to type “signal” but their hands were one key left, then to decode we shift each letter one key : thmyl fylm zym sabt
You’ve seen the string: thmyl fylm zym sabt . At first glance, it looks like a typo-filled mess or a forgotten autocorrect disaster. But this phrase is actually a perfect example of a keyboard shift cipher — a simple yet surprisingly effective method for hiding messages in plain sight. Maybe it’s a instead
Actually, let’s shift on a US QWERTY keyboard: thmyl fylm zym sabt
t→y, h→j, m→, (comma?), y→u, l→; — no, that’s worse.