[计] nested phrase indexing system

qiàn tào duǎn yǔ biāo yǐn xì tǒng ㄑㄧㄢˋ ㄊㄠˋ ㄉㄨㄢˇ ㄩˇ ㄅㄧㄠ ㄧㄣˇ ㄒㄧˋ ㄊㄨㄥˇ