Add comment to grading of writing.

helper/exercises.py

@@ -238,6 +238,27 @@ def build_write_blanks_solutions_listening(words: [], start_id):
         )
     return solutions
 
+def get_perfect_answer(question: str, size: int):
+    messages = [
+        {
+            "role": "system",
+            "content": (
+                'You are a helpful assistant designed to output JSON on this format: '
+                '{"perfect_answer": "perfect answer for the question"}')
+        },
+        {
+            "role": "user",
+            "content": ('Write a perfect answer for this writing exercise of a IELTS exam. Question: ' + question)
+
+        },
+        {
+            "role": "user",
+            "content": ('The answer must have at least ' + str(size) + ' words')
+
+        }
+    ]
+    token_count = count_total_tokens(messages)
+    return make_openai_call(GPT_4_O, messages, token_count, GEN_TEXT_FIELDS, GEN_QUESTION_TEMPERATURE)
 
 def generate_reading_passage(type: QuestionType, topic: str):
     messages = [