B3311331313231311331322331333132333133313132233133313231323221211   >>    B331133131323131133132233133313233313331313223313331323132322121   <<    B3311331313231311331322331333132333133313132233133313231323221213   >>      B3311331313231311331322331333132333133313132233133313231323221212   >>