(6) Given the universal set $U=\{x \mid x$ is a prime number not greater than 20 $\}$. If $A \cap \complement_{U} B=\{3,5\}, \complement_{U} A \cap$ $B=\{7,19\}, \complement_{U}(A \cup B)=\{2,17\}$, then $A=$ $\qquad$ , $B=$ $\qquad$ .
$\begin{array}{l}\text { (6) }\{3,5,11,13\},\{7, \\ 19,11,13\}\end{array}$