B3311331313231311331322331333132313231323331333131123313331323223313233212131   >>    B331133131323131133132233133313231323132333133313112331333132322331323321213   <<    B3311331313231311331322331333132313231323331333131123313331323223313233212133   >>      B3311331313231311331322331333132313231323331333131123313331323223313233212132   >>