B3311331313231311331322331333132333132332113313331333133313221121311   >>    B331133131323131133132233133313233313233211331333133313331322112131   <<    B3311331313231311331322331333132333132332113313331333133313221121313   >>      B3311331313231311331322331333132333132332113313331333133313221121312   >>