9 goal swing needed, in effect 10 because we've score more goals than Swansea too.
So 9-0 defeat and 1-0 win for Swansea, or 8-0 and 2-0, 7-0 or 3-0, 6-0 and 4-0, 5-0 and 5-0, you can do the rest.
But, if Huddersfield lose both of their games, then we'll be safe whatever happens.