This is makeindex, version 2.15 [TeX Live 2019] (kpathsea + Thai support).
Scanning input file main.idx....done (148 entries accepted, 0 rejected).
Sorting entries....done (1121 comparisons).
Generating output file main.ind....done (225 lines written, 0 warnings).
Output written in main.ind.
Transcript written in main.ilg.
