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Difficulty: MediumCoding and Decoding

In a cryptographic system used for secure communications, the word 'CROWN' is coded as 'ETNYP'. Based on this same coding logic, match the following words on the left with their correct coded forms on the right.

  • PAINTRZHPV
  • SHARKUJZTM
  • MOUSEONTUD
  • BRICKDTHEM

Answer

PAINT matches with RZHPV, SHARK matches with UJZTM, MOUSE matches with ONTUD, and BRICK matches with DTHEM.
Each word perfectly aligns with its encrypted code when applying the specific rule derived from the stem: shifting consonants forward by 2 letters in the alphabet, and shifting vowels backward by 1 letter.

Step-by-Step Solution

1
Analyze the example 'CROWN' to identify the shift pattern for each letter.
C becomes E (+2), R becomes T (+2), O becomes N (-1), W becomes Y (+2), and N becomes P (+2).
Identifying how the example word is transformed is the first step in decoding the underlying encryption logic.
2
Generalize the coding rule based on the distinct letter types.
Consonants (C, R, W, N) are shifted forward by 2 positions (+2). The vowel (O) is shifted backward by 1 position (-1).
A consistent rule must be established that applies differently to vowels and consonants in order to decode other words.
3
Apply the derived rule to the target words on the left.
Applying the rule yields: PAINT -> RZHPV, SHARK -> UJZTM, MOUSE -> ONTUD, BRICK -> DTHEM.
Encoding each word accurately allows us to find its correct corresponding match on the right side.

Key Concept

Coding based on letter categorization (vowels vs. consonants) with distinct positional shifts.
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Topics

Coding and Decoding

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