straight-through style [manufacturers cash in at a loss]] thumb style [manufacturers cash in at a loss]]

2 pairs of black +2 pairs of white [8 pieces in total and 4 pairs]] 1 pair black +1 pair white [4 pieces in total and 2 pairs]] 4 pairs of black [8 in total and 4 pairs]] 3 pairs of black [6 pieces in total and 3 pairs]] 2 pairs of black [4 pieces in total and 2 pairs]] 1 pair black [2 pieces in total and 1 pair]] 4 pairs of white [8 in total and 4 pairs]] 3 pairs of white [6 pieces in total and 3 pairs]] 2 pairs of white [4 pieces in total and 2 pairs]] 1 pair of white [2 in total and 1 pair]] half pair [1 and half pairs in total]]