B3311331313231311331322331333132313132313331323223313233313222211   >>    B331133131323131133132233133313231313231333132322331323331322221   <<    B3311331313231311331322331333132313132313331323223313233313222213   >>      B3311331313231311331322331333132313132313331323223313233313222212   >>