B3311331313231311331322331333132313331323131323223313113313231323132212312121   >>    B331133131323131133132233133313231333132313132322331311331323132313221231212   <<    B3311331313231311331322331333132313331323131323223313113313231323132212312123   >>      B3311331313231311331322331333132313331323131323223313113313231323132212312122   >>