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Create a simple implementation of the classic textual game Hunt the Wumpus.

The rules are:

The game is set in a cave that consists of a 20 room labyrinth.
Each room is connected to 3 other rooms (the cave is modeled after the
vertices of a dodecahedron).
The objective of the player is to find and kill the horrendous beast Wumpus that lurks in the cave.

The player has 5 arrows.
If they run out of arrows before killing the Wumpus, the player loses the game.

In the cave there are:

* One Wumpus
* Two giant bats
* Two bottomless pits

If the player enters a room with the Wumpus, he is eaten by it and the game is lost.

If the player enters a room with a bottomless pit, he falls into it and the game is lost.

If the player enters a room with a giant bat, the bat takes him and transports him into a random empty room.

Each turn the player can either walk into an adjacent room or shoot into an adjacent room.

Whenever the player enters a room, he "senses" what happens in adjacent rooms.
The messages are:

* Nearby Wumpus: "You smell something terrible nearby."
* Nearby bat: "You hear a rustling."
* Nearby pit: "You feel a cold wind blowing from a nearby cavern."

When the player shoots, he wins the game if he is shooting in the room with the Wumpus.
If he shoots into another room, the Wumpus has a 75% of chance of waking up and moving into an adjacent room: if this is the room with the player, he eats him up and the game is lost.
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(formerly Perl 6)
See Hunt the Wumpus/Raku