Consider a rectangle A B C D having 5,7,6,9 points in the interior of the line segments A B, C D, B C, D A, respectively. Let \alpha be the number of triangles having these points from different sides as vertices and \beta be the number of quadrilaterals having these points from different sides as vertices. Then, (\beta-\alpha) is equal to [16 Mar 2021 Shift 2]