env2;
fk;
sssssssdddrrrmmmmeeeffffffttttxxxxx;
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x # A x . # D # x x # x B # x
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# # # # D # x # x x L . 8 x U
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x # B x x L x # . 7 x x A # x
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3 . x U # 4 . x L R x x x . 2