title: Bash: Make a specific pattern lowercase within a string
body: <p>I need help writing a function for articles in strings.
  I want to take an input like "MICE OF MEN" and turn it into "MICE of MEN."
  I've been trying to use awk to break up the pattern into substrings but I've been having trouble printing out something that resembles the original input. Does anyone better understand how to use awk or any other tools to do this?</p>
  
  <p>Thank you for any help.</p>