Xiao Wang is a librarian responsible for shelving 7 books labeled A, B, C, D, E, F, G on a shelf with positions 1 to 7.

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

Question:
Based on the above conditions, please arrange the 7 books from left to right on the bookshelf, i.e. positions 1 through 7. Return your answer with the format <<< a list of strings >>>, one solution is enough.for example:
<<<["A", "B", "C"]>>>
Your answer:
