# Textual Strategy for: Qwen-72B (Qwen_72B_InitialAgent)
# LLM API: huggingface, Model: Qwen/Qwen2.5-72B-Instruct
# LLM Suggested Fallback: C

### Strategy Description for `Qwen_72B_InitialAgent`

#### Core Logic

1. **Initial Moves:**
   - **First Move:** Always Cooperate ('C'). This is a friendly and cooperative starting point, which can encourage mutual cooperation from the opponent.
   - **Second Move:** If the opponent defected in the first round, defect ('D') in the second round to punish the defection. Otherwise, cooperate ('C') again to continue the cooperative pattern.

2. **Subsequent Moves:**
   - **Tit-for-Tat (TFT) with a Twist:**
     - For most of the subsequent rounds, the function will follow a Tit-for-Tat (TFT) strategy, which means it will mimic the opponent's previous move. This encourages mutual cooperation and punishes defection.
     - However, to add a strategic twist, the function will occasionally (with a small probability) defect to test the opponent's response. This helps in detecting and countering exploitative strategies.

3. **Analyzing `opponent_program_code`:**
   - **Self-Play Detection:** If the `opponent_program_code` is identical to the current agent's code, it indicates self-play. In self-play, the function will follow a more cooperative strategy to maximize the mutual benefit.
   - **Opponent Analysis:** If the opponent's code is different, the function will analyze the code to detect known exploitative or predictable patterns. If such patterns are detected, the function will adjust its strategy accordingly (e.g., defect more often).

4. **Edge Cases:**
   - **Empty Histories:** If either `my_history` or `opp_history` is empty, the function will default to the initial move logic (cooperate first, then respond to the opponent's first move).
   - **Short History:** If the history is very short (e.g., less than 3 moves), the function will be more cautious and cooperative to build a pattern of trust.

#### Detailed Steps

1. **First Move:**
   - Always return 'C'.

2. **Second Move:**
   - If the opponent's first move is 'D', return 'D'.
   - Otherwise, return 'C'.

3. **Subsequent Moves:**
   - **Tit-for-Tat with a Twist:**
     - With a 90% probability, return the opponent's last move.
     - With a 10% probability, return 'D' to test the opponent's response.
   - **Self-Play Detection:**
     - If `opponent_program_code` is identical to the current agent's code, return 'C' to maximize mutual cooperation.
   - **Opponent Analysis:**
     - If the opponent's code suggests a predictable or exploitative strategy, adjust the probability of defecting to be higher (e.g., 20%).

4. **Edge Cases:**
   - If `my_history` or `opp_history` is empty, return 'C'.
   - If the history is very short (less than 3 moves), return 'C'.

#### Default Fallback Move