82. Xiao Juan went to the stationery store to buy pens. It is known that a watercolor pen costs 1 yuan and 7 jiao each, and a ballpoint pen costs 1 yuan and 2 jiao each. She brought 15 yuan and spent it all. Then Xiao Juan bought $\qquad$ watercolor pens and $\qquad$ ballpoint pens.
Reference answer: 6, 4