D1323112331313331313311232322331323132322331333131323133313231231221   >>    D132311233131333131331123232233132313232233133313132313331323123122   <<    D1323112331313331313311232322331323132322331333131323133313231231223   >>      D1323112331313331313311232322331323132322331333131323133313231231222   >>