3.3--16.17.21.41.42.43.46.47.50.53.54.55.56.57.59
3.4--4.8.11.13.16
3.5--10.16.17.19.23.25.26.36.37.38.40.41.43.45.59.60.61.63.64
3.6--7.9.15.17.27.28.29.30.47.49.52.53.60.68.70
3.7--18.19.23.25.37.45.57.58
review--10.11.25.42.45.46.55.56.57.58
4.1--12.13.15.17.20.22.24.25.31.32.42
4.2--5.9.10.11.18.19.24.37.38.39.40.41.42.51.57.58
4.3--16.17.18.25.27.34.35.36.40.43.44
4.4--13.17.19.20.21.25.26.27.28.29.30.45
4.5--25.35.38.41.43.49
4.6--3.6.35.36.40.42.43.47
4.8--19.20.21.23.26.29.30.35.38.42.56
