A,K,N,P,R,U A ............. 5!=120 K...............5!=120 N..............5!=120 P A............4!=24 P K............4!=24 P N ...........4!=24 PA A .........3!=6 P R K A N U =1 P R K A U N =1 ‌‌ Total ‌=440 ‌⇒440‌th ‌‌ word is PRKA U N ‌