title: Match word followed by space and N number of digits
body: <p>I'm trying to match a word followed by one space or tab character and 5 number digits. For example</p>
  <pre><code>some noise text off 12345 some noise text again.
  </code></pre>
  <p>Another example would be :</p>
  <pre><code>Some noise text off 12345.
  </code></pre>
  <p>The regex should match &quot;off 12345&quot;.
  Number may be followed by punctuation marks.
  The pattern should match the word &quot;off&quot; and not any other word behind the number.</p>
  <p>Thanks</p>