need help to wrire Irule

I need help to wrire Irule for this URL:

 

 

Based on .qa.abc.com/UBB we need to redirect to https://secure.qa.abc.com/servlet/Satellite?lsb=

 

 

Example:

 

 

http://tak.qa.abc.com/UBB want to redirect to https://secure.qa.abc.com/servlet/S...b/HomePage

 

 

is and i want that brand to be append in long url after lsb=

 

 

Please help me on to create iRule.

 

 

Thank YOu