title: CloudWatch Logs Filter case insensitive multiple terms or connected
body: <p>I'm just trying to create an alarm based on CloudWatch Logs Filter which triggers on multiple terms (or connected, not and) and is case insensitive</p>
  
  <p>Using "error warning" as pattern is not working</p>
  
  <p>I'm looking for filter pattern reacting to all of the following errors and warnings:</p>
  
  <pre><code>ERROR: first sample
  Error: second sample
  error: third sample
  { ERROR: "fourth sample"}
  {type: "error"}
  WARNING: SOMETHING BAD!
  { WARNING: "fifth sample"}
  </code></pre>