String reduction

abcdef abef

ab--ef

lmnopq lmq

lm---q

hellothere hello

hello-----

fuzzy fuzz

fuzz-

acorn corn

-corn

impossible possible

--possible

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--q------e-k----k---------l---d--m-------f---------i--j-----d-h-------l-p----o-----a---g--------t----a------e------

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-v--------k-t-q----x--x-------u---------i--k--co----w----h----m------y-----v----y---d--------f-b

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------si-------m------n-p------q---e---j---------d------k--j---m------c---------l-------u-------t---------i--q---b------p

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