This is an example of a completed Tents puzzle. The puzzle starts with a set of horizontal and vertical
clues and a grid containing trees.
Your task is to insert tents in the grid so that,
- Each tree is paired with a tent - the tent must be next to the tree horizontally or vertically.
- Tents are never placed next to each, including diagonally.
- The horizontal and vertical clues tell you how many tents are in that row or column.