# Player Config ID: huggingface_DeepSeek-V3-0324_PayoffMaximizer_B (as Player B)
# Meta-Round: 10
# Experiment: PMxPM, Run: 1
# API: huggingface, Model: deepseek-ai/DeepSeek-V3-0324
# Based on textual strategy: huggingface_DeepSeek-V3-0324_PayoffMaximizer_B_MR10_strategy.txt
# LLM Suggested Fallback: D

def phantom_cooperator(my_history: list, opp_history: list, opponent_program_code: str) -> str:
    current_round = len(my_history) + 1
    if current_round <= 3:
        return "D"
    elif current_round <= 7:
        return opp_history[-1] if opp_history else "D"
    else:
        return "D"