Optional numbers and special characters:
# Numbers
sub one one' by one.ss01;
sub two two' by two.ss01;
sub three three' by three.ss01;
sub four four' by four.ss01;
sub five five' by five.ss01;
sub six six' by six.ss01;
sub seven seven' by seven.ss01;
sub eight eight' by eight.ss01;
sub nine nine' by nine.ss01;
sub zero zero' by zero.ss01;
sub one [two.ss01 three.ss01 four.ss01 five.ss01 six.ss01 seven.ss01 eight.ss01 nine.ss01 zero.ss01 @Etc] one' by one.ss01;
sub two [one.ss01 three.ss01 four.ss01 five.ss01 six.ss01 seven.ss01 eight.ss01 nine.ss01 zero.ss01 @Etc] two' by two.ss01;
sub three [one.ss01 two.ss01 four.ss01 five.ss01 six.ss01 seven.ss01 eight.ss01 nine.ss01 zero.ss01 @Etc] three' by three.ss01;
sub four [one.ss01 two.ss01 three.ss01 five.ss01 six.ss01 seven.ss01 eight.ss01 nine.ss01 zero.ss01 @All] four' by four.ss01;
sub five [one.ss01 two.ss01 three.ss01 four.ss01 six.ss01 seven.ss01 eight.ss01 nine.ss01 zero.ss01 @Etc] five' by five.ss01;
sub six [one.ss01 two.ss01 three.ss01 four.ss01 five.ss01 seven.ss01 eight.ss01 nine.ss01 zero.ss01 @Etc] six' by six.ss01;
sub seven [one.ss01 two.ss01 three.ss01 four.ss01 five.ss01 six.ss01 eight.ss01 nine.ss01 zero.ss01 @Etc] seven' by seven.ss01;
sub eight [one.ss01 two.ss01 three.ss01 four.ss01 five.ss01 six.ss01 seven.ss01 nine.ss01 zero.ss01 @Etc] eight' by eight.ss01;
sub nine [one.ss01 two.ss01 three.ss01 four.ss01 five.ss01 six.ss01 seven.ss01 eight.ss01 zero.ss01 @Etc] nine' by nine.ss01;
sub zero [one.ss01 two.ss01 three.ss01 four.ss01 five.ss01 six.ss01 seven.ss01 eight.ss01 nine.ss01 @Etc] zero' by zero.ss01;
# Special characters
sub y ydieresis' by Ydieresis;
sub Y Ydieresis' by ydieresis;
sub y yacute' by Yacute;
sub Y Yacute' by yacute;