code: def fix_dataset3(self, input_type, phn_info, i):
      if input_type == "hts":
          if phn_info[i * 3 + 2] == "U":
              phn_info[i * 3 + 2] = "u"
          if phn_info[i * 3 + 2] == "I":
              phn_info[i * 3 + 2] = "i"
      return phn_info
  
file_path: espnet/egs2/natsume/svs1/local/prep_segments.py
imports: import os
  from egs2.TEMPLATE.svs1.pyscripts.utils.prep_segments import DataHandler, LabelInfo, SegInfo, get_parser
  from espnet2.fileio.score_scp import MIDReader
label_desc: Use image node_id 3 for calling the NatsumeDataHandler obj's underlying member method code with example usage: obj.fix_dataset3(input_type, phn_info, i) and returns: phn_info