not able to validate keyword using regular expression validators
<p>All ..I want to parse text from user in format of H1,H,H1TUT<br>
BUT not able to do using following Expression [A-Z][0-9][T][U][T]|[A-Z]|[A-Z][0-9]|[A-Z]
What could be fault?? 
it allows all expect length 0f 2 string like..
It allows H1TUT,H but not allowing H1...........</p>

<pre><code>&lt;asp:RegularExpressionValidator ID="RegularExpressionValidator0"  ForeColor="#6600FF" 
                        runat="server" ErrorMessage="Batch Name Should be like H,H1,H1TUT" 
                            Display="Dynamic" ControlToValidate="tbbatchname" ValidationGroup="form"
                            ValidationExpression="[A-Z][0-9][T][U][T]|[A-Z]|[A-Z][0-9]|[A-Z]"&gt;*&lt;/asp:RegularExpressionValidator&gt;
</code></pre>
