cw (20 - 1)

cw (1 - 1)

cw (2 - 1)

cw (4 - 1)

cw (5 - 1)

cw (6 - 1)

cw (7 - 1)

cw (8 - 1)

cw (9 - 1)

cw (11 - 1)