The voiced alveolo-palatal sibilant affricate is a type of consonantal sound, used in some spoken languages. The symbols in the International Phonetic Alphabet that represent this sound are ⟨d͡ʑ⟩, ⟨d͜ʑ⟩, ⟨ɟ͡ʑ⟩ and ⟨ɟ͜ʑ⟩, and the equivalent X-SAMPA symbols are d_z\ and J\_z\, though transcribing the stop component with ⟨ɟ⟩ (J\ in X-SAMPA) is rare. The tie bar is sometimes omitted, yielding ⟨dʑ⟩ or ⟨ɟʑ⟩ in the IPA and dz\ or J\z\ in X-SAMPA. This is potentially problematic in case of at least some affricates, because there are languages that contrast certain affricates with stop-fricative sequences. Polish words czysta ('clean (f.)', pronounced with an affricate /t͡ʂ/) and trzysta ('three hundred', pronounced with a sequence /tʂ/) are an example of a minimal pair based on such a contrast.