Actually used Pinyin sounds
I know I have asked this before, but I want to know if there is a list somewhere on the internet of Pinyin sounds that are used and not used. for example;
fo2 is a pinyin sound that is actually used in the language
fo3 I believe is a sound that has no meaning or character
I know about the pinyin chart on this site, that included 1627 sound combinations, but I know that some combinations are not used.
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