Non-barred: Sa, Sb, Sc
Sa1
|
Sa2
|
Sa3
|
Sb1
|
Sb2
|
Sb3
|
Sc1
|
Sc2
|
Sc3
|
Barred: SBa, SBb, SBc
SBa1
|
SBa2
|
SBa3
|
SBb1
|
SBb2
|
SBb3
|
SBc1
|
SBc2
|
SBc3
|