1

Part of 2002 Portugal MO

Problems(1)

881st position of different words alphabetically7 letters A, N, A, V, I, S, O

Source: Portugal OPM 2002 p1

The keyword that Ana Viso chose for her computer has the

7

characters of her name: A, N, A, V, I, S, O. Sorting all the different words alphabetically formed by all these

7

characters, Ana's keyword appears in the

881

st position. What it is Ana's keyword?