Constraint with pattern in XSD

It's my first question in the forum, so if I do something wrong I apologize in advance. I was trying to do an XSD exercise where the address element must be made up of any set of letters, then a blank space and finally a number between 1 and 200. For this I have to use the "pattern" constraint and talking about it with a colleague we thought of putting it like this:

   <xsd:element name="direccion">
     <xsd:simpleType>
      <xsd:restriction base="xsd:string">
       <xsd:pattern value="[a-z]*\b(200)|(1[0-9][0-9])|([1-9][0-9])|([1-9])"/>
      </xsd:restriction>
     </xsd:simpleType>
   </xsd:element>`

The problem is that it would not be quite right and also the validator gives me an error, I do not know if you would know how to change it so that it complies with the norm and does not give an error. Thank you very much.