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

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:
