F3313231133131133131232322331323123231323223313132233132313331313232212331   >>    F331323113313113313123232233132312323132322331313223313231333131323221233   <<    F3313231133131133131232322331323123231323223313132233132313331313232212333   >>      F3313231133131133131232322331323123231323223313132233132313331313232212332   >>