@@40@@
/\W13(th)?\scentury/
15 /\W12\d\d\W/
-10 /\W11(0|1|2|3|4)\d\W/
-10 /\W13(5|6|7|8|9)\d\W/
-10 /\W(12|14|15|16|17|18|19|20)(th)?\scentury/
-10 /\W1(4|5|6|7|8)\d\d\W/