C13332313311211113313331333131133133313232233132313113313232223323211   >>    C1333231331121111331333133313113313331323223313231311331323222332321   <<    C13332313311211113313331333131133133313232233132313113313232223323213   >>      C13332313311211113313331333131133133313232233132313113313232223323212   >>