@@40@@
/\W18(th)?\scentury/
15 /\W17\d\d\W/
-10 /\W16(0|1|2|3|4)\d\W/
-10 /\W18(5|6|7|8|9)\d\W/
-10 /\W(12|13|14|15|16|17|19|20)(th)?\scentury/
-10 /\W1(1|2|3|4|5)\d\d\W/