D1212121212131323223313233231323133313231323331311331323331323132321   >>    D121212121213132322331323323132313331323132333131133132333132313232   <<    D1212121212131323223313233231323133313231323331311331323331323132323   >>      D1212121212131323223313233231323133313231323331311331323331323132322   >>