There is also a very rare voiceless alveolar bilabially trilled affricate , ( occasionally written `` tᵖ '' ) reported from Pirahã and from a few words in the Chapacuran languages Wari ' and Oro Win .
There is also voiceless alveolar bilabially trilled affricate ( [ t̪͡ʙ̥ ] , sometimes `` tᵖ '' ) , which is not often used . It is found in Pirahã and from a few words in the Chapacuran languages Wari ' and Oro Win .