Pentomino Fences

Background

While the grid for this puzzle is similar to that for Slitherlink, the puzzle itself is different.

This puzzle appears in "Challenge Your Brain Math & Logic Puzzles" (Dave Tuller & Michael Rios, Puzzle Wright Press).

An unsolved puzzle consists of a 18x10 rectangular array of dots. Some numbered clues have been placed.

The goal is to create 12 regions of 5 squares each, representing each possible pentomino.

The solved grid must satisfy the following conditions:

Penotominos do not touch each other, even diagonally.

Each number clue indicates the number of sides of the containing cell that contain a segment.