B3311331313231311331322331333131133132333132333133313223313231323221232313221   >>    B331133131323131133132233133313113313233313233313331322331323132322123231322   <<    B3311331313231311331322331333131133132333132333133313223313231323221232313223   >>      B3311331313231311331322331333131133132333132333133313223313231323221232313222   >>