B3311331313231311331322331333132333132332113313331333133313233311321   >>    B331133131323131133132233133313233313233211331333133313331323331132   <<    B3311331313231311331322331333132333132332113313331333133313233311323   >>      B3311331313231311331322331333132333132332113313331333133313233311322   >>