D1212121221323132313232332313232233132333132322121122112323222321   >>    D121212122132313231323233231323223313233313232212112211232322232   <<    D1212121221323132313232332313232233132333132322121122112323222323   >>      D1212121221323132313232332313232233132333132322121122112323222322   >>