B3311331313231311331322331333132313233313231333131133131133131323223313231221   >>    B331133131323131133132233133313231323331323133313113313113313132322331323122   <<    B3311331313231311331322331333132313233313231333131133131133131323223313231223   >>      B3311331313231311331322331333132313233313231333131133131133131323223313231222   >>