Daily puzzle: Hitori

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Rules: In this grid some cells have to filled black in such a manner that in each row and each column no number appears more than once in a white cell. Blacks cells must not appear side by side or on top of each other. No white cell must be cut off from the rest of white cells. They need to be all linked with their sides.

Tipp: It helps to circle all cells which you have identified as white.