# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/(?sx)
(?|
０(?=.*(0))
|１(?=.*(1))
|２(?=.*(2))
|３(?=.*(3))
|４(?=.*(4))
|５(?=.*(5))
|６(?=.*(6))
|７(?=.*(7))
|８(?=.*(8))
|９(?=.*(9))
)/\1/gsx;t' <<< "０ zero
１ ichi
２ ni
３ san
４ shi
５ go
６ roku
７ shichi
８ hachi
９ kyuu
0123456789"
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html