B3311331313231311331322331333132313231333133313311232313231323221232322121   >>    B331133131323131133132233133313231323133313331331123231323132322123232212   <<    B3311331313231311331322331333132313231333133313311232313231323221232322123   >>      B3311331313231311331322331333132313231333133313311232313231323221232322122   >>