If Pour is written as 4156 Sware is written as 78269 Clear is written as 3@926…

Concept

In a letter-substitution (coding–decoding) problem, every letter is assigned one fixed symbol. The mapping is hidden, so you recover it by lining up the letters of each given word against its code and reading off each letter’s symbol. Letters that appear in more than one word must get the SAME symbol every time — that consistency is what proves the mapping is correct. Once the full table is built, you encode the target word letter by letter.

Build the mapping

Align each given word with its code, one letter to one symbol:

Cross-check the shared letters

• R appears in all three words and is 6 each time — consistent.

• E appears in SWARE and CLEAR and is 9 both times — consistent.

• A appears in SWARE and CLEAR and is 2 both times — consistent.

Because every repeated letter keeps the same symbol, the table is reliable.

Encode PEARL

Take the letters of PEARL in order and substitute each symbol:

1. P → 4

2. E → 9

3. A → 2

4. R → 6

5. L → @

Reading the symbols in the order of the letters P-E-A-R-L gives the code 4926@.