D23312331311331313231323223313232113313113313311212233232213221   >>    D2331233131133131323132322331323211331311331331121223323221322   <<    D23312331311331313231323223313232113313113313311212233232213223   >>      D23312331311331313231323223313232113313113313311212233232213222   >>