B3311331313231311331322331333132313231333131323223313231322221211   >>    B331133131323131133132233133313231323133313132322331323132222121   <<    B3311331313231311331322331333132313231333131323223313231322221213   >>      B3311331313231311331322331333132313231333131323223313231322221212   >>