Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_39 (enrollment VARCHAR, ihsaa_class VARCHAR, mascot VARCHAR)
### Question:
What is the enrollment at the school with IHSAA class A and where mascot is the Vikings?
### Answer:
SELECT enrollment FROM table_name_39 WHERE ihsaa_class = "a" AND mascot = "vikings"