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_1745843_6 (class VARCHAR, part_3 VARCHAR)
### Question:
How many different classes of verbs are there whose part 3 is lucon?
### Answer:
SELECT COUNT(class) FROM table_1745843_6 WHERE part_3 = "lucon"