[经] combination numbering and lettering method

wén zì shù zì jié hé biān hào fǎ ㄨㄣˊ ㄗˋ ㄕㄨˋ ㄗˋ ㄐㄧㄝˊ ㄏㄜˊ ㄅㄧㄢ ㄏㄠˋ ㄈㄚˇ