Shcha
Shcha (Щ щ; italics: Щ щ) is a letter of the Cyrillic script. In Russian, it represents the voiceless alveolo-palatal fricative /ɕɕ/, similar to the pronunciation of ⟨sh⟩ in sheep (but longer); in Ukrainian and Rusyn it represents the consonant cluster /ʃt͡ʃ/; and in Bulgarian, it represents the consonant cluster /ʃt/.
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