Resources:
  Bucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName:
        Fn::Sub: some-bucket${!AWS::AccountId}7896${ ! AWS::Region}1-1${!Immediate}234
  AnotherBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName:
        !Sub 1-${AWS::Region}-foo-${Bucket}-${!Literal}-${Bucket.DomainName}-${AWS::Region}