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X         ** A      X     XAA   AX
XA A     ***        X     XA  * AX
X  A      **        X     XAA*AA X
XA                  X     X ***  X
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X    A A A     AA   X
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XA    A             X
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XA                  X
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XA                 *X
X                  *X
X                 **X
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