You can use grammarinator or any other of myriad grammar fuzzers BUT I'd start with radamsa and its string-related flags. Radamsa is _awesome_, you run it on an

You can use grammarinator or any other of myriad grammar fuzzers BUT I'd start with radamsa and its string-related flags. Radamsa is _awesome_, you run it on an input and you get mutated output. Works both for binary files and text fles (such as grammars).