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On the map above:
1) Sure, let's walk through the park.
2) Let's turn left instead of right & see where we end up
3) We seem to be getting farther & farther away. Maybe we should walk along this path by the ravine.
4) We are saved! We know where we are again. (OK, step 4 doesn't appear on the map, picture it back where our red path meets the yellow road. )
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