Japanese Sums (Hitori) (886)

Place a digit from the specified list into some cells so that no digit appears more than once in each row or column. Cells may remain empty. Numbers outside the grid indicate all sums of continuous groups of digits (including "sums" of a single digit) along that row or column. These groups are separated by empty cells. These sums are given in the same order as their corresponding groups of digits.
The value of some sums are unknown to you and have been replaced by question marks ('?'). Sums are never zero. All digits must be connected orthogonally and no two empty cells are adjacent orthogonally.

Reference: WPF (1)