docs: def parse_dereplicated_uc(dereplicated_uc_lines):
      """ Return dict of seq ID:dereplicated seq IDs from dereplicated .uc lines
  
      dereplicated_uc_lines: list of lines of .uc file from dereplicated seqs from
       usearch61 (i.e. open file of abundance sorted .uc data)
      """
  
      dereplicated_clusters = {}
  
      seed_hit_ix = 0
      seq_id_ix = 8
      seed_id_ix = 9
  
      for line in dereplicated_uc_lines:
          if line.startswith("#") or len(line.strip()) == 0:
              continue
          curr_line = line.strip().split('\t')
          if curr_line[seed_hit_ix] == "S":
              dereplicated_clusters[curr_line[seq_id_ix]] = []
          if curr_line[seed_hit_ix] == "H":
              curr_seq_id = curr_line[seq_id_ix]
              dereplicated_clusters[curr_line[seed_id_ix]].append(curr_seq_id)
  
      return dereplicated_clusters