NIL
1.2.3.4.5.6.7.8.9.10.11
12.13.14.15.16.17.18.19
20.21.22.23.24.25.26.27
28
1.2.3.4.5.6.7.8.9.10
28.29.30.31.32.33.34.35
36.37.38.39.40.41.42.43
44.45.46.47.48.49.50.51
52.53.54.55.56.57.58.59
60.61.62.63.64.65.66.67
68.69.70.71.72
20.21.22.23
1.2.3.4.5.6.7.8.9
20
20.21.22.23.24.25.26