B3311331313231311331322331333132333133313221133132313231333132313231323221221   >>    B331133131323131133132233133313233313331322113313231323133313231323132322122   <<    B3311331313231311331322331333132333133313221133132313231333132313231323221223   >>      B3311331313231311331322331333132333133313221133132313231333132313231323221222   >>