configMgr collection do not contain letters in it

The collection listed below might help you to identify if any computers in organization that do not follow the standard naming convention .

Below collection is created to list servers and do not contain specific words in computer name:

select SMS_R_System.Name, SMS_R_System.OperatingSystemNameandVersion from  SMS_R_System where (SMS_R_System.OperatingSystemNameandVersion like “%Server 6.%” or SMS_R_System.OperatingSystemNameandVersion like “%Server 5.%”) and SMS_R_System.ResourceId not in (select ResourceID  from  SMS_R_System where SMS_R_System.Name like “%xxx%”)

The Logic is : list all servers with criteria given above and computer do not have xxx word in it.

Please change the bold letters as per the requirement.