Pull the slider to form the braid and the list of permutations.[br]Duplicate permutations are shown in light gray.

Thanks to Bill Mill's idea for this visualization of permutations (http://billmill.org/permvis.html).[br][br]The computation is done using either the permutation formula (4!/2!) or the combination formula (C(4,2))(C(2,1)(C(1,1))