D212213231311233131313331322331311331313232233131311331313232212321   >>    D21221323131123313131333132233131133131323223313131133131323221232   <<    D212213231311233131313331322331311331313232233131311331313232212323   >>      D212213231311233131313331322331311331313232233131311331313232212322   >>