B3311331313231311331322331333132313231333131323223313113313113221   >>    B331133131323131133132233133313231323133313132322331311331311322   <<    B3311331313231311331322331333132313231333131323223313113313113223   >>      B3311331313231311331322331333132313231333131323223313113313113222   >>