title: Regular expression matching with string
body: <p>I need a regular expression which match only string "MachineABC" and "MachineABCTest". </p>
  
  <p>I tried expression like this : MachineABC["Test"]*. But its not working as expected. What is the right regular expression for this scenario.?</p>
  
  <p>I was testing with the grep utility. eg : echo "MachineABCTest" | grep 'MachineABC["Test"]+'.
  example grep returns null.</p>