or
21 21 21 21 21 21 23 23 23 23 22 22 23 23 23 23 20 20 25 25 25 25 28 28 27 27 22 22 24 24 25 25 22 22 21 21 24 24 20 20 27 27 24 24 22 22 21 21 21 21 20 21 22 23 24 25 26 27 28 29 2 4 6 8 10 12 10% 20% 30% 40% 50%