<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>Find the id of students who do not have a cat pet.

SQL Table Create Statement:
CREATE TABLE has_pet (stuid VARCHAR, petid VARCHAR); CREATE TABLE pets (petid VARCHAR, pettype VARCHAR); CREATE TABLE student (stuid VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT stuid FROM student EXCEPT SELECT T1.stuid FROM student AS T1 JOIN has_pet AS T2 ON T1.stuid = T2.stuid JOIN pets AS T3 ON T3.petid = T2.petid WHERE T3.pettype = 'cat'</codeend><|end|>