Comment by avereveard

Well except when it doesn't, I guess. All combination of consonants may unpredictably get rounded down to f (wszystko) ą pronunciation at the end of the word has a wide range of sounds depending on regional accents, ę is the same but worse because it's usually ignored even in common words (część), you have all the usual Ci Cy Ca rules for palatal consonant, except these characters can also be part of longer sequences that are hard coded to a specific sound like szcz that is pronounced like "an untuned FM radio sound"