$P2$ (#3)

$P2_{1}$ (#4)

$C2$ (#5)

$Pm$ (#6)

$Pc$ (#7)

$Cm$ (#8)

$Cc$ (#9)

$P2/m$ (#10)

$P2_{1}/m$ (#11)

$C2/m$ (#12)

$P2/c$ (#13)

$P2_{1}/c$ (#14)

$C2/c$ (#15)