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X     X      X    XXX    XXXX     X      X    XXXX   XXX    XXX      X    XXXX   XXXX   XXXX   XXXX   XXXX   XXX
____X______X___________XXXX___XXXX___XXXX___XXXX___XXXX___XXXX___XXXX___XXXX_____X______X______X______X______X____XXXX___XXX____XXXX___XXXX_____X______X____XXX___________X_X______XX___XXXX___XXXX_____X______X____XXXX___XXXX_____X_____XXX___XXXX___XXX_____X______X____XXX____XXXX_____X______X____XXXX___XXX____XXX______X____XXXX___XXXX___XXXX___XXXX___XXXX___XXX