B3311331313231311331322331333132313231323331333131323223313231323222121   >>    B331133131323131133132233133313231323132333133313132322331323132322212   <<    B3311331313231311331322331333132313231323331333131323223313231323222123   >>      B3311331313231311331322331333132313231323331333131323223313231323222122   >>