  } The complete structure of this new subgroup and its subgroups generated by one or more bi-immune rearrangements is unknown.
<meaning-changed>   } The complete structure of this new subgroup and its subgroups generated by one or more bi-immune rearrangements is unknown.
 Furthermore, the bi-immune symmetric group is dense in Sym(mathbb } The complete structure of this new subgroup and its subgroups generated by one or more bi-immune rearrangements is unknown.