Perhaps something like egrep i ' az ' usrsharedictwords would be the simplest way to get the results you want . This way it matches any word beginning with some letter and containing only vowels afterward , the i switch makes the search caseinsensitive , this way you don ' t have to use more complex regex patterns . <| sep |> Are they really necessary since perfecting shock collars ? <| sep |> Bernie is a different breed . They didn ' t have video of Obama at a Sandinista rally . <| sep |> Enemy . No clue i literally just after season 2 ended I started playing Smite and got interested in the eSports situation there was at the moment and I just instantly loved Enemy and hated Soar . No clue as to why I have either of those opinions .