At a job fair of the company, the administration department, human resources department and office of the company each plan to recruit a staff member  Three graduates from the Chinese Department, the History Department and the philosophy Department came to apply for these three different positions
Graduates of the Chinese department are older than those of the philosophy department.
 The recruitment information shows that the graduates of the history department are older than the graduates of the office, the graduates of the philosophy department and the graduates of the human resources department wear similar colors, and the graduates of the human resources department are younger than those of the Chinese department