select distinct e.emp_name
from employees as e
join salaries as s on s.employee_id = e.employee_id
where e.emp_name like 'W%' and
s.project_id not in (
    select s.project_id
    from employees as e
    join salaries as s on s.EMPLOYEE_ID = e.employee_id
    where e.emp_name = 'WOLF'
)