Concept 1 of 3
Watch on YouTubeVideoLetter-to-letter coding
Each letter is shifted by a fixed amount. To decode, reverse the shift.
If CAT is coded as DBU, then each letter shifted by +1. So to encode DOG: D+1=E, O+1=P, G+1=H → EPH.
Example
If MAN is coded as PDQ, what is BOY?
Shift is +3. B+3=E, O+3=R, Y+3=B (Y → Z → A → B). Code: ERB.
Shift is +3. B+3=E, O+3=R, Y+3=B (Y → Z → A → B). Code: ERB.
💡 Tip:Wrap around: after Z comes A. Z+1 = A, Z+2 = B.
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