You are a highly experienced educational content creator  for Indian competitive exams such as Railway (Typist - Non_Technical_Posts) under the subject of General English or Hindi (as opted). The topic is **Antonyms**.. Your task is to generate a detailed **bilingual explanation (English + Hindi)** for a **mnemonic anagram letter** for topic Antonyms, using the following inputs.

    Generate a Markdown output using this structure:

    ---

    🧠 **Anagram (Short)**: OPPOSITE  
    📖 **Expanded (English)**: OPPOSITE  
    📖 **Expanded (Hindi)**: विपरीत

    ---

    ### 🔠 Letter: O / व — *One Word Antonyms / एक शब्द के विपरीत शब्द*

    #### 📚 Concept:
    - EN: One Word Antonyms  
    - HI: एक शब्द के विपरीत

    #### 🧠 Type:
    - EN: One Word Antonyms  
    - HI: एक शब्द के विपरीत शब्द

    #### 📖 Description:
    - EN: Antonyms consisting of single meaningful words with opposite meanings.  
    - HI: एक शब्द के विपरीत अर्थ वाले शब्द।

    #### 📌 Explanation:
    - EN: One word antonyms are single words that express a meaning directly opposite to another word, commonly used in vocabulary sections of exams.  
    - HI: एक शब्दवाले विपरीत ऐसे शब्द होते हैं जो किसी शब्द के सीधे विपरीत अर्थ को व्यक्त करते हैं।

    #### ➗ Formula or Relation:
    - EN: **If word = X, antonym = Y such that meaning(X) = opposite(meaning(Y))**  
    - HI: **यदि शब्द = X, तो विपरीत = Y, जहां अर्थ(X) = अर्थ(Y) का उल्टा हो।**

    #### 💡 Example Questions:
    **ENGLISH:**
    ["Identify the correct one-word antonym of 'Abundant' from the options - Sparse, Ample, Plentiful, Overflowing. Justify why the opposite fits best in a spoken English context.", "In the sentence, 'The project was a colossal failure,' find the one-word opposite of 'Colossal' that can replace it while keeping the sentence meaning intact and formal.", "From the list: 'Generous, Stingy, Altruistic, Selfless', select the antonym of 'Generous' and explain how its usage changes the tone of a formal letter."]

    **HINDI:**
    ['‘Abundant’ शब्द का एकल विपरीत शब्द चुनिए: Sparse, Ample, Plentiful, Overflowing। यह स्पष्ट करें कि बोली जाने वाली अंग्रेजी में सबसे उपयुक्त विपरीत क्यों है।', 'वाक्य में ‘The project was a colossal failure,’ ‘Colossal’ का ऐसा एकल विपरीत शब्द बताइये जो औपचारिक संदर्भ में सही हो।', 'वैकल्पिक शब्दों में से ‘Generous’ का विपरीत चुनें: Stingy, Altruistic, Selfless और औपचारिक पत्र की भाषा कैसे बदलती है, समझाइए।']

    ---
    object should have:

        - "mnemonic_letter_english", "mnemonic_letter_hindi"
        - "type_english", "type_hindi"
        - "description_english", "description_hindi"
        - "difficulty_level_english", "difficulty_level_hindi"
        - "exam_frequency_english", "exam_frequency_hindi"
        - "time_to_solve_english", "time_to_solve_hindi"
        - "clue_words_english": list of 4-5 identifying keywords/phrases
        - "clue_words_hindi": same in Hindi
        - "what_to_use_english", "what_to_use_hindi"
        - "formula_english", "formula_hindi"
        - "alternative_formulas_english", "alternative_formulas_hindi": list of 2-3 alternative formulas
        - "algorithm_english", "algorithm_hindi": step-by-step string list
        - "quick_method_english", "quick_method_hindi"

        - "example": answer the question give in the above.
 
          - Require multi-step calculation or reasoning.
          - NOT be short phrases, fragments, or simplified school-level word problems. including:
            - "example_no"
            - "question_english", "question_hindi"
            - "solution_steps_english": step list
            - "solution_steps_hindi": step list
            - "answer_english", "answer_hindi"
            - "verification_english", "verification_hindi"

        - "variations_english", "variations_hindi": list of variation types
        - "related_concepts_english", "related_concepts_hindi": related subtopics or concepts
        - "common_mistakes_english", "common_mistakes_hindi": list of 10 traps or errors
        - "tip_english", "tip_hindi": short-cut or important tip
        - "prerequisite_knowledge_english", "prerequisite_knowledge_hindi": list of 3 concepts
        - "practice_problems_english", "practice_problems_hindi": list of 3  full-length and detailed practical, compact competitive-level example questions** per type.  
      ⚠️ Each question should be a complete practical competitive exam-style question — **not short phrases**, **not sentence fragments**, and **not duplicated.** Each question must:
      - Be **fully detailed**, realistic, and at least 3 sentences long
       - Include numerical data and **real-world constraints** like shifts, rest cycles, changing efficiencies, worker roles, or overlapping tasks.

        Use simple, learner-friendly language and return only the JSON object in your response, formatted with proper indentation and structure.
        Use clear language suitable for aptitude learners and format the JSON cleanly

### 🔁 output JSon should be

```json
            { 
              "mnemonic_letter_english": "",
              "mnemonic_letter_hindi": "",
              "type_english": "",
              "type_hindi": "",
              "description_english": "",
              "description_hindi": "",
              "difficulty_level_english": "",
              "difficulty_level_hindi": "",
              "exam_frequency_english": "",
              "exam_frequency_hindi": "",
              "time_to_solve_english": "",
              "time_to_solve_hindi": "",
              "clue_words_english": [
                  "",
                  "",
                  "",
                  "",
                  ""
              ],
              "clue_words_hindi": [
                  "",
                  "",
                  "",
                  "",
                  ""
              ],
              "what_to_use_english": "",
              "what_to_use_hindi": "",
              "formula_english": "",
              "formula_hindi": "",
              "alternative_formulas_english": [
                  "",
                  ""
              ],
              "alternative_formulas_hindi": [
                  "",
                  ""
              ],
              "algorithm_english": [
                  "",
                  "",
                  "",
                  ""
              ],
              "algorithm_hindi": [
                  "",
                  "",
                  "",
                  ""
              ],
              "quick_method_english": "",
              "quick_method_hindi": "",
              "example": [
                  {
                  "example_no":"",
                  "question_english": "",
                  "question_hindi": "",
                  "solution_steps_english": [
                      "",
                      "",
                      "",
                      "",
                      ""
                  ],
                  "solution_steps_hindi": [
                      "",
                      "",
                      "",
                      "",
                      ""
                  ],
                  "answer_english": "",
                  "answer_hindi": "",
                  "verification_english": "",
                  "verification_hindi": ""
              }..,],
              "variations_english": [
                  "",
                  "",
                  ""
              ],
              "variations_hindi": [
                  "",
                  "",
                  ""
              ],
              "related_concepts_english": [
                  "",
                  "",
                  ""
              ],
              "related_concepts_hindi": [
                  "",
                  "",
                  ""
              ],
              "common_mistakes_english": [
                  "",
                  ""
              ],
              "common_mistakes_hindi": [
                  "",
                  ""
              ],
              "tip_english": "",
              "tip_hindi": "",
              "prerequisite_knowledge_english": [
                  "",
                  "",
                  ""
              ],
              "prerequisite_knowledge_hindi": [
                  "",
                  "",
                  ""
              ],
              "practice_problems_english": [
                  "",
                  ""
              ],
              "practice_problems_hindi": [
                  "",
                  ""
              ]
          }