B3311331313231311331322331333132313331322121133133313331333133313233113311211   >>    B331133131323131133132233133313231333132212113313331333133313331323311331121   <<    B3311331313231311331322331333132313331322121133133313331333133313233113311213   >>      B3311331313231311331322331333132313331322121133133313331333133313233113311212   >>