B3311331313231311331322331333132313331323133313233313123232213221   >>    B331133131323131133132233133313231333132313331323331312323221322   <<    B3311331313231311331322331333132313331323133313233313123232213223   >>      B3311331313231311331322331333132313331323133313233313123232213222   >>