Windmill Sudoku

Windmill Sudoku (Kazaguruma) is a combination of five Sudoku grids with common blocks shaped like the wings of a windmill. Each of these five puzzles cannot be solved separately; there is only one common solution.

Rules: Five regular 9×9 Sudoku grids have some blocks in common. None of these grids can be solved separately, but all of them together have a unique solution.
In each cell of the 9×9 grid, enter a number from the range 1–9. Each number must appear exactly once in each row, column, and block.