B3311331313231311331322331333131133132333132333133313223313231311332221   >>    B331133131323131133132233133313113313233313233313331322331323131133222   <<    B3311331313231311331322331333131133132333132333133313223313231311332223   >>      B3311331313231311331322331333131133132333132333133313223313231311332222   >>