D212213231311233131313331322331311331313232233131322132313231323311   >>    D21221323131123313131333132233131133131323223313132213231323132331   <<    D212213231311233131313331322331311331313232233131322132313231323313   >>      D212213231311233131313331322331311331313232233131322132313231323312   >>