D233123313113313132313231311112331323221323223313231323211231211   >>    D23312331311331313231323131111233132322132322331323132321123121   <<    D233123313113313132313231311112331323221323223313231323211231213   >>      D233123313113313132313231311112331323221323223313231323211231212   >>