s
1
2
3
4
5
ℤ
3
S
3
S
3
×
ℤ
2
S
4
S
4
×
ℤ
2
|
G
α
|
3
2
⋅
3
2
2
⋅
3
2
3
⋅
3
2
4
⋅
3