title: R Regular expression for string containing full stops
body: <p>I have a bunch of strings, some of which end with <code>..t.</code>. I am trying to find a regular expression to match these strings but dealing with the full stops is giving me a headache!</p>
  
  <p>I have tried</p>
  
  <pre><code>grep('^.+(..t.)$', myStrings)
  </code></pre>
  
  <p>but this also matches strings such as <code>w...gate</code>. I think I am dealing with the full stops incorrectly. Any help at all appreciated.</p>
  
  <p>Note: I am using grep within R.</p>