There are 12 seats in a row in the auditorium. Xiaofang and Xiaoying are twin sisters. Let them sit together, and Xiaofang is on Xiaoying's right. How many different ways can they sit in the same row?
礼堂里一排有12个座位，小芳、小英是孪生姐妹，要让她俩坐在一起，并且小芳在小英的右边，在同一排有多少种不同的坐法．
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<result>11</result>