Question 12
Consider all the words obtained as permutations of the letters $\{D,U,R,B,A,N\}$. All these words are written in a row, arranged in alphabetical order, starting from $\mathrm{ABDNRU}$, and ending with $\mathrm{URNDBA}$. What is the position of the word $\mathrm{DURBAN}$ in this sequence?