Araf

Araf is a logic puzzle. Divide the grid into regions, each containing two numbers and a size ranging between them.

Rules: The grid must be divided into regions along the grid lines. Each cell belongs to exactly one region, and each region must contain exactly two cells with a number.
The number of cells N in each region must be strictly between these numbers. If the two numbers are A and B, A < B must be valid: A < N < B.