B3311331313231311331322331333131133132333132333133313223313231311331313221   >>    B331133131323131133132233133313113313233313233313331322331323131133131322   <<    B3311331313231311331322331333131133132333132333133313223313231311331313223   >>      B3311331313231311331322331333131133132333132333133313223313231311331313222   >>