“…The algorithm first detects the basic B&F s, which are the category pairs (2,4) 1 (i.e., m and m), (4,6), (11,13), (7,9), (8,10) and (10, 12) (i.e., f and f), and updates the array BF . Vector P keeps the category pair (1, 7) as a candidate B&F .…”