D1212121221323132313232332313232233132313232213331323221323221121   >>    D121212122132313231323233231323223313231323221333132322132322112   <<    D1212121221323132313232332313232233132313232213331323221323221123   >>      D1212121221323132313232332313232233132313232213331323221323221122   >>