B3311331313231311331322331333132313231333133313311211111333132112323221321   >>    B331133131323131133132233133313231323133313331331121111133313211232322132   <<    B3311331313231311331322331333132313231333133313311211111333132112323221323   >>      B3311331313231311331322331333132313231333133313311211111333132112323221322   >>