What does Leviticus 11:21 mean?

Yet these may ye eat of all winged creeping things that go upon all fours, which have legs above their feet, wherewith to leap upon the earth;

Yet these may ye eat of every flying creeping thing that goeth upon all four, which have legs above their feet, to leap withal upon the earth;

Yet these may ye eat of all winged creeping things that go upon all fours, which have legs above their feet, wherewith to leap upon the earth;

But of the winged four-footed things, those which have long legs for jumping on the earth you may have for food;

`Only--this ye do eat of any teeming thing which is flying, which is going on four, which hath legs above its feet, to move with them on the earth;

But whatsoever walketh upon four feet, but hath the legs behind longer, wherewith it hoppeth upon the earth,

Yet these shall ye eat of every winged crawling thing that goeth upon all four: those which have legs above their feet with which to leap upon the earth.