Xiao Wang is a librarian responsible for shelving 6 books labeled A, B, C, D, E, F on a shelf with positions 1 to 6.

The constraints are:
1. Book B must be adjacent to book D.
2. Book D must be adjacent to book B.
3. Book D must be placed in position 3.
4. Book C must be to the right of book E.
5. Book F must be adjacent to book D.
6. Book C cannot be placed in position 4.
7. Book C must be adjacent to book A.
8. Book D must be to the right of book F.

Question:
Based on the above conditions, please arrange the 6 books from left to right on the bookshelf, i.e. positions 1 through 6. Return your answer with the format <<< a list of strings >>>, one solution is enough.for example:
<<<["A", "B", "C"]>>>
Your answer:
