1 = BS
2 = BN
3 = SDSH
4 = SDSL
5 = WDSH
6 = WDSL
7 = SDNH
8 = SDNL
9 = WDNH
10 = WDNL
11 = ISH
12 = ISL
13 = INH
14 = INL
15 = SRSL
16 = SRNH
17 = SRNL
18 = WRSH
19 = WRSL
20 = WRNH
21 = WRNL