Two consecutive underscores are not allowed even though the challenge requests the following:
Trail__c
Description__c
Distance__c
Last_Inspection_Date__c

"Error: The Object Name field can only contain underscores and alphanumeric characters. It must be unique, begin with a letter, not include spaces, not end with an underscore, and not contain two consecutive underscores."

Please advise how to accomplish this challenge. Thanks!