Your previous grammar for {task_lang} was executed by the machine and FAILED on these attested pairs:

{failures_block}

("got" is what your grammar produced under mechanical execution; "expected" is the attested truth.)

Previous grammar:
{previous_grammar}

Diagnose the failures (wrong lexicon gloss? missing affix? missing rewrite rule at a morpheme boundary? wrong constituent order?) and emit a CORRECTED complete JSON grammar in the same format. The corrected grammar must reproduce every attested pair, including the ones above, when executed mechanically. JSON only.