F3313231133131133131232322331323123231323223313132233132313331313311221   >>    F331323113313113313123232233132312323132322331313223313231333131331122   <<    F3313231133131133131232322331323123231323223313132233132313331313311223   >>      F3313231133131133131232322331323123231323223313132233132313331313311222   >>