F3313231133131133131232322331323123231323223313132233132322223311   >>    F331323113313113313123232233132312323132322331313223313232222331   <<    F3313231133131133131232322331323123231323223313132233132322223313   >>      F3313231133131133131232322331323123231323223313132233132322223312   >>