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The Head
The machine has a head — like a finger pointing at one box.
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1
0
1
1
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HEAD
The Catch:
The head can only see ONE box at a time.
Like reading a book through a keyhole — one letter at a time.
The head can do exactly 3 things:
READ the symbol
WRITE a new symbol
MOVE left or right
Use the buttons to move the head:
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1
0
1
1
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HEAD
Head sees:
1
Write: