what's the ungen for ត្រីទស?
CREATE TABLE "sanskrit_and_pali_influence" (
  "value" text,
  "khmer" text,
  "word_form" text,
  "ungegn" text,
  "ala_lc" text,
  "notes" text
);
SELECT "ungegn" FROM "sanskrit_and_pali_influence" WHERE "word_form"='ត្រីទស';