B3311331313231311331322331333132333132332113313331333133313232112313231323311   >>    B331133131323131133132233133313233313233211331333133313331323211231323132331   <<    B3311331313231311331322331333132333132332113313331333133313232112313231323313   >>      B3311331313231311331322331333132333132332113313331333133313232112313231323312   >>