B3311331313231311331322331333132313233313231333131133133313223313231231221   >>    B331133131323131133132233133313231323331323133313113313331322331323123122   <<    B3311331313231311331322331333132313233313231333131133133313223313231231223   >>      B3311331313231311331322331333132313233313231333131133133313223313231231222   >>