16
16,17
16,17
16.5, 17.5, 18,19.5, 20, 21
17, 19, 20,21
16,18
16, 17, 19,20
16,17
16.5, 17.5,18
17,18
17-18, 18-19
17-18, 19-20
16, 17,18
16, 17, 18
16,17
16,17