KöMaL 2007 K148
Anna, Bea, Cecilia, Dora, Emma and Fiona are going to the cinema. Their tickets are for six consecutive seats in a row. Anna and Bea insist on sitting next to each other, and Cecilia and Dora are not willing to sit next to each other at all. How many different seatings are there with these restrictions?
Official text KöMaL. Quoted with source.
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