B3311331313231311331322331333132313331323133313233313211232313232131   >>    B331133131323131133132233133313231333132313331323331321123231323213   <<    B3311331313231311331322331333132313331323133313233313211232313232133   >>      B3311331313231311331322331333132313331323133313233313211232313232132   >>