/b/ and /bʲ/ did not occur intervocalically, on account of having merged with /β, βʲ/.[18] The same may also have occurred after /r/ or /l/.[19] /dʲ/ and /ɡʲ/ did not occur intervocalically, on account of both having merged with /j/.[20] /kʷ/ and /ɡʷ/ did not occur before back vowels, on account of having delabialized to /k, ɡ/.[21]