@@40@@
/\W15(th)?\scentury/
15 /\W14\d\d\W/
-10 /\W13(0|1|2|3|4)\d\W/
-10 /\W15(5|6|7|8|9)\d\W/
-10 /\W(12|13|14|16|17|18|19|20)(th)?\scentury/
-10 /\W1(1|2|6|7|8)\d\d\W/