B3311331313231311331322331333132313331323131323223313113313231333112121   >>    B331133131323131133132233133313231333132313132322331311331323133311212   <<    B3311331313231311331322331333132313331323131323223313113313231333112123   >>      B3311331313231311331322331333132313331323131323223313113313231333112122   >>