[填空题]
Tyler needs to decide the ordeveaa(ax ie: 1+r in whichu+ryi(u.-a vo to schedule 11 exams for his school. Two of these exams are Chemistry ( 1 SL and 1 HL). Find the number of different ways Tyler can schedule the 11 exams given thayr. v (-uuao+it the two Chemistry subjects must not be consecutive. a = b =