What does Leviticus 13:31 mean?

And if the priest look on the plague of the scall, and, behold, the appearance thereof be not deeper than the skin, and there be no black hair in it, then the priest shall shut up him that hath the plague of the scall seven days:

And if the priest look on the plague of the scall, and, behold, it be not in sight deeper than the skin, and that there is no black hair in it; then the priest shall shut up him that hath the plague of the scall seven days:

And if the priest look on the plague of the scall, and, behold, the appearance thereof be not deeper than the skin, and there be no black hair in it, then the priest shall shut up him that hath the plague of the scall seven days:

And after looking at the diseased place, if it does not seem to go deeper than the skin, and there is no black hair in it, then the priest will have him shut up for seven days:

`And when the priest seeth the plague of the scall, and lo, its appearance is not deeper than the skin, and there is no black hair in it, then hath the priest shut up <FI>him who hath<Fi> the plague of the scall seven days.

But if he perceive the place of the spot is equal with the flesh that is near it, and the hair black: he shall shut him up seven days,

And if the priest look on the sore of the scall, and behold, it is not in sight deeper than the skin, and there is no black hair in it, the priest shall shut up [him that hath] the sore of the scall seven days.