Recall that a line is tangent to a circle if they have only one point
of intersection, a circle is called inscribed in a polygon if it is
tangent to every side as a segment of that polygon.
In the triangle \(EFG\) the line \(EH\) is the median. Two circles with
centres \(A\) and \(C\) are inscribed into triangles \(EFH\) and \(EGH\) respectively, they are tangent to the
median \(EH\) at the points \(B\) and \(D\). Find the length of \(BD\) if \(EF-EG=2\).