On the Subject of Literal Maze

Sometimes, the best way to get an idea out of your head is to dive deep into it.

The module shows a 4×4 grid of letters. Each letter corresponds to a configuration of walls.

Deduce the wall configurations in such a way that:

• Same letters correspond to same wall configurations.
• Different letters correspond to different wall configurations.
• There is a wall around the outer edge.
• Adjacent cells agree on whether there is a wall between them or not.
• The resulting structure is a maze in which every location is reachable from every other (no isolated regions).
• At least one cell has the wall configuration shown at the top of the module.

Once the maze structure is deduced, enter the maze as follows:

• Determine which letter corresponds to the wall configuration shown at the top of the module.
• Tap any of the cells with that letter.
• Repeat this process until the entire maze is revealed.