title: Grep expressions c
body: <p>I am facing problem with getting regular expression for grep for these patterns:-</p>
  
  <p>1).what words contain but do not begin with the string 'ps'.</p>
  
  <p>2)What option has a description with the words "hide entries". (next line that contains some text after specified word.</p>
  
  <p>I googled but didnt find it.
  Any suggestions will be appreciated. 
  Thanks</p>