8. A craft show was held in a local park. Booths were set up along the various footpaths in the park. The booths, represented by dots, and the footpaths, represented by line segments, are shown in the diagram below. Visitors must enter the park at point A and exit the park at point B. Travel is restricted to the footpaths, and visitors can only move in the directions indicated by the arrows. How many different routes can a visitor take through the park?