SQL & PL/SQL

Hi Everyone,
Please see the below code and help me insert these string values. How can I trap that string value and insert it?

DECLARE
BEGIN
  for i in (SELECT STRAGG(Q.QUESTION_CODE)
              FROM QUESTION Q , TEST_CODE_CONVERSION TC
             WHERE Q.ACTIVE_YN = 'Y'
               AND Q.TEST_ID = TC.EAST_TEST_ID
          GROUP BY Q.TEST_ID)
  LOOP
          INSERT INTO TEST_CODE_CONVERSION (QCODE_FOR_WEST_TEST_ID)
          VALUES (___________) ;
          dbms_output.put_line('1 row inserted');               
  END LOOP; 
End;

Regards,
BS2012.