# Q2a · Wordlist puzzle and lexical resource

Subject: Natural Language Processing

Exam: TEE

Reader: https://deep-learning-study-room.vercel.app/nlp/#tee/papers/legacy-r24/q2a

Canonical: https://deep-learning-study-room.vercel.app/read/nlp/tee/papers/legacy-r24--q2a/

Previous examination · complete worked answers

**Question. Explain lexical resources. Solve the wordlist puzzle with letters E,G,I / V,R,V / O,N,L. Words must have at least four letters, contain centre R, use each tile at most once, and include at least one nine-letter word.** [10 marks]

### Answer

### Given

|  | Column1 | Column2 | Column3 |
| --- | --- | --- | --- |
| Row1 | E | G | I |
| Row2 | V | R | V |
| Row3 | O | N | L |

### To find

Find valid words and explain how a wordlist corpus supplies the candidates.

### Formula: which one and why

A lexical resource stores words and linguistic information. Filter an explicitly chosen dictionary by length, mandatory letter and a multiset of tile counts; duplicate V tiles permit two Vs.

### Step 1. Count available tiles

E1,G1,I1,V2,R1,O1,N1,L1.

### Step 2. Apply all predicates

For each lowercase dictionary word w: length(w)≥4; r occurs; for every letter c, count\_w(c)≤count\_tiles(c). Deduplicate dictionary entries.

### Step 3. Verify examples

| Word | Reason |
| --- | --- |
| revolving | 9 letters: r e v o l v i n g; uses both V tiles and all others once |
| roving | 6 letters, includes R, within tile counts |
| lover | 5 letters, includes R |
| giver | 5 letters, includes R |
| groin | 5 letters, includes R |
| iron | 4 letters, includes R |
| ring | 4 letters, includes R |
| rove | 4 letters, includes R |

### Step 4. Explain the requested count

The count is the number of entries surviving those checks in the chosen wordlist. No wordlist/version is supplied, so a unique total cannot be stated. The examples above are verified examples, not an exhaustive dictionary.

### Final answer

**REVOLVING** is a valid nine-letter answer. Enumerate all other valid entries using the declared wordlist.

**Source / convention note.** The dictionary is unspecified; an exact number of valid words would be fabricated.