B3311331313231311331322331333132313331322331323133313311231323132313211   >>    B331133131323131133132233133313231333132233132313331331123132313231321   <<    B3311331313231311331322331333132313331322331323133313311231323132313213   >>      B3311331313231311331322331333132313331322331323133313311231323132313212   >>