D212213231311233131313331322331311331313232233132311313231323132313232212111   >>    D21221323131123313131333132233131133131323223313231131323132313231323221211   <<    D212213231311233131313331322331311331313232233132311313231323132313232212113   >>      D212213231311233131313331322331311331313232233132311313231323132313232212112   >>