66. Xiao Qiang, Fei Fei, and Xiao Jing each have several books. If Xiao Qiang lends 20 books to Fei Fei, Fei Fei lends 15 books to Xiao Jing, and Xiao Jing lends 10 books to Xiao Qiang, at this point they each have 35 books. How many books did Xiao Qiang, Fei Fei, and Xiao Jing originally have? $\qquad$
Reference answer: $45,30,30$