ref: 9da3fda9e080e052b3e6851f73f9207a6f39fa4a dir: /rc/bin/feminize/
#!/bin/rc exec sed 's/ [aeiou]n([a-z][a-z][a-z])/ man\1/; s/ [a-z]em([a-z][a-z][a-z])/ fem\1/; s/ [aeiou]m/ fem/;'