five letter palindromes (words that are the same backwards as forwards) (kayak,dewed,eye,refer)
I"m a little confused about this question. I don"t know how to write it
five letter palindromes (words that are the same backwards as forwards) (kayak,dewed,eye,refer)
I"m a little confused about this question. I don"t know how to write it
^ ([a-zA-Z]) ([a-zA-Z]) [a-zA-Z]\ 2\ 1 $
references the previously matched characters with \ 1,\ 2 .
\b(\w)(\w)\w\2\1\b