What does 1 Chronicles 11:15 mean?

And three of the thirty chief men went down to the rock to David, into the cave of Adullam; and the host of the Philistines were encamped in the valley of Rephaim.

Now three of the thirty captains went down to the rock to David, into the cave of Adullam; and the host of the Philistines encamped in the valley of Rephaim.

And three of the thirty chief men went down to the rock to David, into the cave of Adullam; and the host of the Philistines were encamped in the valley of Rephaim.

And three of the thirty went down to David, to the rock, into the strong place of Adullam; and the army of the Philistines had taken up their position in the valley of Rephaim.

And three of the thirty heads go down on the rock unto David, unto the cave of Adullam, and the host of the Philistines is encamping in the valley of Rephaim,

And three of the thirty captains went down to the rock, wherein David was, to the cave of Odollam, when the Philistines encamped in the valley of Raphaim.

And three of the thirty chiefs went down to the rock to David, to the cave of Adullam, when the army of the Philistines was encamped in the valley of Rephaim.