18 19 19.20 20 20.21 21 22 22.23 23 23.24 24 24.25 25 25.26 26 27 27.28 28 28.29 29 29-30 29.30 30 30.31 31 31-32 32 32.33 33-34 33 33.34 34 34.35 35-36 35 36 37-38 38