Regular Expression Help

[bloodsside14]

I have a simple question i know this is basic but i can't get the right expression.

/^.*:\s+.?.?(one|two).?.?\s*$/i

That regex can answer this to get the answer "one":

!@one_!

My question is if the output is like this

!@o2ne_1

What would be my expression to get only the answer "one"?
How can i disregard the 2 there inside the "one" word.

[leinad31]

Either replace all characters that are not alphabets [^a-z&&[^A-Z]], or extract alphabets via capture groups and matcher class.