Voiceless approximants are rarely distinguished from voiceless fricatives. An original voiceless alveolar lateral fricative became . The letter K usually represents the voiceless velar plosive. Mangbetu and Ninde have phonemically voiceless bilabial trills. Occasionally also voiceless consonant letters can represent voiced sounds in clusters. The voiceless plosives are pronounced with aspiration. Yidiny consonants, with no underlyingly voiceless consonants, are posited. The fricatives were voiceless in initial position. In Japanese and in Quebec French, vowels that are between voiceless consonants are often devoiced. The additional consonants are a series of preaspirated stops and a series of voiceless sonorants. The Hakha Chin language differentiates between voiced, voiceless, and voiceless aspirated obstruents. Similarly, ejective nasals such as (also necessarily voiceless) are possible. For instance, represents the palatalized form of the voiceless alveolar stop . A few languages have phonemic voiceless nasal occlusives. Stops were no longer distinguished between fortis and aspirated but were voiceless and voiced.