B3311331313231311331322331333132333132332113313331333133313232222221   >>    B331133131323131133132233133313233313233211331333133313331323222222   <<    B3311331313231311331322331333132333132332113313331333133313232222223   >>      B3311331313231311331322331333132333132332113313331333133313232222222   >>