D2123133311233131323131323132333132323132313331323211331323223313232233221   >>    D212313331123313132313132313233313232313231333132321133132322331323223322   <<    D2123133311233131323131323132333132323132313331323211331323223313232233223   >>      D2123133311233131323131323132333132323132313331323211331323223313232233222   >>