B3311331313231311331322331333131133132333132333133313223313231323221211311   >>    B331133131323131133132233133313113313233313233313331322331323132322121131   <<    B3311331313231311331322331333131133132333132333133313223313231323221211313   >>      B3311331313231311331322331333131133132333132333133313223313231323221211312   >>