D212213231311233131313331322331311331313232233132322121211113313111123311   >>    D21221323131123313131333132233131133131323223313232212121111331311112331   <<    D212213231311233131313331322331311331313232233132322121211113313111123313   >>      D212213231311233131313331322331311331313232233132322121211113313111123312   >>