or download this
Win8 Strawberry 5.8.9.5 (32) Mon 09/06/2021 1:53:18
C:\@Work\Perl\monks
...
Matches for FULL regex pattern: (?x-ism: ^ .?s? $ )
'' -> '' 'x' -> 'x' 'a' -> 'a' 's' -> 's' 'as' -> 'as' 'es' -> 'e
+s' 'is' -> 'is' 'os' -> 'os' 'hs' -> 'sh' 'is' -> 'si' 'os' -> '
+so'
----------------------------