 Vietnamese preserves all of the endings , and (spelt -"c").Additionally, after the vowels "ê" or "i", the ending -"c" changes to -"ch", giving rise to -"ich" and -"êch", and "ach" (pronounced like "aik") also occurs for some words ending with -"k".Only the "sắc" and "nặng" tones are allowed on check tones; in Sino-Vietnamese vocabulary, those tones were split from the Middle Chinese "entering" tone in a similar fashion to Cantonese.