B3311331313231311331322331333132313233313231333131133133112323223321   >>    B331133131323131133132233133313231323331323133313113313311232322332   <<    B3311331313231311331322331333132313233313231333131133133112323223323   >>      B3311331313231311331322331333132313233313231333131133133112323223322   >>