Given alphabets are A,H,L,U,R, so the number of words starts with letter A=4!=24 The number of words starts with letter H=4!=2.4 The number of words starts with letter L=4!=24 Now, the next word start with R and order wise words are RAHLU and RAHUL. So in dictionary order the rank of word RAHUL is 24+24+24+1+1=74