B3311331313231311331322331333132313331322121133133313113313233112121   >>    B331133131323131133132233133313231333132212113313331311331323311212   <<    B3311331313231311331322331333132313331322121133133313113313233112123   >>      B3311331313231311331322331333132313331322121133133313113313233112122   >>