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According to the book, what is the original unassimilated pattern for the derived door اِفَّاعَلَ?

Derived Trilateral - Bab 8: If'aal & Bab 9: If'il (Assimilation Doors)

• تَفَاعُلٌ
• تَفَعُّلٌ
• اِفْتِعَالٌ
• اِسْتِفْعَالٌ